tag:blogger.com,1999:blog-70885504226210221842024-03-07T05:00:53.839+09:00Multiple-Degree of Freedom Cavity Resonator DiaryI am developing loudspeaker enclosure. Mines are mostly multiple degree of freedom cavity resonator types. These systems are world-premier systems. You will find the most advanced features in my web site.
This Blog is to take notes of daily weekly or monthly activities.MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.comBlogger55125tag:blogger.com,1999:blog-7088550422621022184.post-72281813459541304052023-11-19T07:46:00.032+09:002023-11-19T17:44:22.446+09:00Mechanical Matrix MMX Speaker System<p> I noticed that installing speaker drivers both L and R channel to same chamber makes stereo effects more than ten year ago.</p><p>It was a test model for MCAP-CR application.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjifZ7VA_wA1Qf2GVJqwCN81Jj-MT7PNIr8VSUiVpde7nd3j4-DZxAFN-moz9rkDaUHJGe7QcamQW9RsEKPbe3HrbnpF0JiJtFhgncp38IHGaZ2E0XouZYYggnlfCU4Hv-axr2LCVwcybku1e4RayCEbog3ocQg29S1Gcff6f1Q5uaIK1FxhUdiDiKNwL0m/s400/a0246407_21251840.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="300" data-original-width="400" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjifZ7VA_wA1Qf2GVJqwCN81Jj-MT7PNIr8VSUiVpde7nd3j4-DZxAFN-moz9rkDaUHJGe7QcamQW9RsEKPbe3HrbnpF0JiJtFhgncp38IHGaZ2E0XouZYYggnlfCU4Hv-axr2LCVwcybku1e4RayCEbog3ocQg29S1Gcff6f1Q5uaIK1FxhUdiDiKNwL0m/s320/a0246407_21251840.jpg" width="320" /></a></div><br /><p>Primary focus was to verify if thin film bottle could substitute for speaker driver membrane. The answer was "no"; however, it was found thin film bottle can be used as MCAP-CR subchamber.</p><p>This system has both L and R drivers in the main wood chamber. I was curious about stereo effect, though L and R were installed closely.</p><p>I recently tested above effect with 8" full-range drivers (photograph below).</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEx47NRDTwrwt0ErjUIg0_xbMgEAu61HT_wZGVlA1fpsOySXMuc4fZ9cGyrf5oVbOqcnwAyPsBQG6ALcyk7eA8PAFkKQ9n0sMtxram4FiL4ecPvuOccKO0fa9JMp6SoY800y6tLyoDUDngFJR7useSbUn9sudmFswmN9DM4x6dOpBntgbbHoBYq0Qy3BC8/s640/MMX-1.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="640" data-original-width="480" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEx47NRDTwrwt0ErjUIg0_xbMgEAu61HT_wZGVlA1fpsOySXMuc4fZ9cGyrf5oVbOqcnwAyPsBQG6ALcyk7eA8PAFkKQ9n0sMtxram4FiL4ecPvuOccKO0fa9JMp6SoY800y6tLyoDUDngFJR7useSbUn9sudmFswmN9DM4x6dOpBntgbbHoBYq0Qy3BC8/s320/MMX-1.jpg" width="240" /></a></div><br /><p>This model has two (L & R) FE206E frivers in same chamber. Real sound field effect was given by this system in big room.</p><p>Now let us see the system of electrical matrix speaker system (let us call "EMX" speaker system) below:</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhp6gzMWxZGJiR3PMh8eoXnPH9FT88-UDRJTdAM11RTikY9MvIV2jmyi_47kE-I7RcP3y9ivFkcnKVBPUlOUpM1O6qeiSWMd3PuoxbJV0Ou5DcI4syW_-HKBdd0QvZmYrVZhBMzFuFSGssktX7LTXNme-Y1apIVfjLieN557nHTQabJ49C00JPk4_soOK_f/s536/emx.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="415" data-original-width="536" height="248" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhp6gzMWxZGJiR3PMh8eoXnPH9FT88-UDRJTdAM11RTikY9MvIV2jmyi_47kE-I7RcP3y9ivFkcnKVBPUlOUpM1O6qeiSWMd3PuoxbJV0Ou5DcI4syW_-HKBdd0QvZmYrVZhBMzFuFSGssktX7LTXNme-Y1apIVfjLieN557nHTQabJ49C00JPk4_soOK_f/s320/emx.png" width="320" /></a></div><br /><p>EMX is electrical wiring system with unbalanced amplifier whose negative terminal is grounded. Balanceed amplifire may not be used for MMX system.</p><p>Mechanical matrix speaker system (let us call "MMX" speaker system) is very standard shown below:</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhszOEETY7vegEYtxbWHk3NxUX_VnuagLqGIgG9OLS88IwYkmMnZ3vqcVHnmhiCX0puHUpRgi0Za-kz2VJY0YB-3-gQn4_KRlbpd5W7eQOIj4iMO2Bru8TOSdXvZUKuJfcUlrRidgNClU_zdW3U9evhOMS-GiSHXZ2FX37EdoaIV-N4Ai-091VZuIxmNPYH/s472/mmx-principle.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="336" data-original-width="472" height="228" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhszOEETY7vegEYtxbWHk3NxUX_VnuagLqGIgG9OLS88IwYkmMnZ3vqcVHnmhiCX0puHUpRgi0Za-kz2VJY0YB-3-gQn4_KRlbpd5W7eQOIj4iMO2Bru8TOSdXvZUKuJfcUlrRidgNClU_zdW3U9evhOMS-GiSHXZ2FX37EdoaIV-N4Ai-091VZuIxmNPYH/s320/mmx-principle.png" width="320" /></a></div>MMX uses acoustic signal from from back side of speaker driver. Phase of acoustic signal from back side is negative, therefore, it is mixed with positive signal from front side of the driver. Thus MMX can get same effect as EMX system. In addition, balanced amplifier may be used for MMX, because wiring is typical standard.<div><br /></div><div>I suppose MMX system has exisited since early stereo age. MMX is simple so that many people must have tried it. On the other hand, I suppose, many trials were not recognized as matrix system. I stress that MMX system has long hitory, while it has not been recognized as matrix system.<br /><div><br /></div><div>MMX system is so flexible that it allows number of variations.</div><div>Below is typical configuration.</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjrB86g9BA51PqrHIL0rIbtqGnxxE1bFB5glz3WzcJb_OZM0OBSM_a_gn_Ml_KAbdcqj8nilyV4Yvy4P0E47lUja5sxY9rE-R5KVBdPYRjrAsJG4joMKksES_ydMS9qt8b67H35bDVaSSlF4Dh7zujIYUx91iPgLxBwUQHZQeawm0XnaBXY3WfFty1iowip/s193/mmx-type01.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="193" data-original-width="193" height="193" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjrB86g9BA51PqrHIL0rIbtqGnxxE1bFB5glz3WzcJb_OZM0OBSM_a_gn_Ml_KAbdcqj8nilyV4Yvy4P0E47lUja5sxY9rE-R5KVBdPYRjrAsJG4joMKksES_ydMS9qt8b67H35bDVaSSlF4Dh7zujIYUx91iPgLxBwUQHZQeawm0XnaBXY3WfFty1iowip/s1600/mmx-type01.png" width="193" /></a></div>Below is also typical configuration.<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkMSD0sJADlIJo7LvWRex84Vrl14hyphenhyphen5ndVIpT5NHOHyWjRK1d-1BSGjZjAK-doYLhyyGnEGmZOpqCViP8nr9PSVY9aqZc0yQl5zOP9wrNUaueqjwSj1HNt3Wn5q8KB7blMMDKqjMaTffZBgvW9iCIghCbHLi__NLn12wC73uIOx0jjDlll1NRRNDDcfSrc/s271/mmx-type02.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="271" data-original-width="271" height="271" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkMSD0sJADlIJo7LvWRex84Vrl14hyphenhyphen5ndVIpT5NHOHyWjRK1d-1BSGjZjAK-doYLhyyGnEGmZOpqCViP8nr9PSVY9aqZc0yQl5zOP9wrNUaueqjwSj1HNt3Wn5q8KB7blMMDKqjMaTffZBgvW9iCIghCbHLi__NLn12wC73uIOx0jjDlll1NRRNDDcfSrc/s1600/mmx-type02.png" width="271" /></a></div><br /><div>Configuration below is as well practical.</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEicVczwPdPArCXZ63YpIzL0pTqoqzhVuaIt2S4LPGAULI45yc9vINxwe_gGyPnHMbLl2x5Xf_wc8ALI-JflJflITaEMfzLSlloGz6CKdHFpViYw2D60t6QoBNkWF6eV1CNgXThWgzGerILthdMXyiCCG0kIqnMw7pWQw6orbMOepEYWkFSX-96LWRrGGkG2/s344/mmx-type03.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="117" data-original-width="344" height="109" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEicVczwPdPArCXZ63YpIzL0pTqoqzhVuaIt2S4LPGAULI45yc9vINxwe_gGyPnHMbLl2x5Xf_wc8ALI-JflJflITaEMfzLSlloGz6CKdHFpViYw2D60t6QoBNkWF6eV1CNgXThWgzGerILthdMXyiCCG0kIqnMw7pWQw6orbMOepEYWkFSX-96LWRrGGkG2/s320/mmx-type03.png" width="320" /></a></div><br /><div><br /><div>My recent trial is to include tweeter drivers to the system as shown below:</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgB-4_K3yIyKJ26JzKjgQEm5rPy09Pk_2Eky3xw2Uxx0Jky5BL7JMWZA389cudmkwsYVDZ4uMC5AWTw2FCN6aiKO_r85bptWEy_mmeR-2RnlOXgTfroc83DzlCWX2xFvaaYcIaqO22tMlPkqZPYQH04hdHKsVBac6PHOzWpdRvaUUU2hdV4RUqwzy-N3ySR/s495/a0246407_20104210.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="429" data-original-width="495" height="277" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgB-4_K3yIyKJ26JzKjgQEm5rPy09Pk_2Eky3xw2Uxx0Jky5BL7JMWZA389cudmkwsYVDZ4uMC5AWTw2FCN6aiKO_r85bptWEy_mmeR-2RnlOXgTfroc83DzlCWX2xFvaaYcIaqO22tMlPkqZPYQH04hdHKsVBac6PHOzWpdRvaUUU2hdV4RUqwzy-N3ySR/s320/a0246407_20104210.png" width="320" /></a></div><br /><div>Driver models are indicated in above figure, but they are just example.</div><div>Here are pictures:</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgFXZj7MgcKOO3jtEkzgoK32mEMeeu7Jibua_sWaISF6eMwjdwZJuKbMQ_szyyeiQqxRAG-7L9Af5GX5HjCNwJDZjJfDWC94DE09dWXCek5IBvLH13bVqvzhc1JlZeiKkdgskuZscxWjlKqe-VWyaZYLneW6IDyQaUm68yn9LvtAh9cSLARlEsj7McRz3Kc/s480/a0246407_09202268.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="360" data-original-width="480" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgFXZj7MgcKOO3jtEkzgoK32mEMeeu7Jibua_sWaISF6eMwjdwZJuKbMQ_szyyeiQqxRAG-7L9Af5GX5HjCNwJDZjJfDWC94DE09dWXCek5IBvLH13bVqvzhc1JlZeiKkdgskuZscxWjlKqe-VWyaZYLneW6IDyQaUm68yn9LvtAh9cSLARlEsj7McRz3Kc/s320/a0246407_09202268.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">Inside</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEilCMUNcNLcxu2OSXq6lNWbjmg4Th4mrjrp-_lA2GJGQNG_fFIw7h5wJMYPKA5k9l6ffuGI6esGVelECT9KchW0LlWPiqXDRIU7xp4w3G-1Zvc2TyiVJGp-6-4TLq1Atc0NTB2YOBJSSdiO6CDTYedF16kMWsHlj2zlWF-ie4frT1dVKxtCAQJNWh_YADsn/s640/a0246407_09202778.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="640" data-original-width="480" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEilCMUNcNLcxu2OSXq6lNWbjmg4Th4mrjrp-_lA2GJGQNG_fFIw7h5wJMYPKA5k9l6ffuGI6esGVelECT9KchW0LlWPiqXDRIU7xp4w3G-1Zvc2TyiVJGp-6-4TLq1Atc0NTB2YOBJSSdiO6CDTYedF16kMWsHlj2zlWF-ie4frT1dVKxtCAQJNWh_YADsn/s320/a0246407_09202778.jpg" width="240" /></a></div><div class="separator" style="clear: both; text-align: center;">from left front</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgzidd7zei_VS25r1xyl9D-VJEhZaGeHNdEyH1Ge69IiiX3ATZNHTSWQ5w0luawxsKlkbQzNY0xzfUU5osByRe4BAy3B2b32GaI3LavLocS26eNemLqMOCwfN8UsSfekQfZAKHlh1FacO1EKLNQd3_3meYc-k25_BgWw2FUYMmmtZSmq0eK93IfY0CwEnuK/s640/a0246407_09203253.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="640" data-original-width="480" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgzidd7zei_VS25r1xyl9D-VJEhZaGeHNdEyH1Ge69IiiX3ATZNHTSWQ5w0luawxsKlkbQzNY0xzfUU5osByRe4BAy3B2b32GaI3LavLocS26eNemLqMOCwfN8UsSfekQfZAKHlh1FacO1EKLNQd3_3meYc-k25_BgWw2FUYMmmtZSmq0eK93IfY0CwEnuK/s320/a0246407_09203253.jpg" width="240" /></a></div><div class="separator" style="clear: both; text-align: center;">from right front</div><br /><div>The biggest advantage of MMX is to reduce time, cost and space. MMX can be used in small room at low cost.</div><div>It can be examined easily.<br /><p><br /></p><p><br /></p><p><br /></p></div></div></div>MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-18008418208819320592021-01-08T17:24:00.005+09:002021-01-08T17:24:58.777+09:00New MCAP-CR Performance Simulator is now available!<p> New MCAP-CR Performance Simulator was uploaded to following site:</p><p><a href="http://mcap-cr.com/mcap/software.html">http://mcap-cr.com/mcap/software.html</a></p><p>New simulator is written with OpenOffice BASIC code and distributed as international standard spreadsheet format(*.ods).</p><p>Use free OpenOffice or LibreOffice to open this file.</p><p>You may need to change security setting: it is described in the attached document with the simulator file.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjcgsZlTgVG5KwOxZB45Ox4Fv8n5XsmpvK3DJSwKe2GKn9CZKcVBsylT8zC1bYRLIpaDya7E0u21g3WqIcUSQMC85AbwJo-aSc047sw8jmjYEDxOjAgMOuyxkbOQWkH4KxDxqGJoTWEdOkh/s640/Screenshot_20210102_163621.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="598" data-original-width="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjcgsZlTgVG5KwOxZB45Ox4Fv8n5XsmpvK3DJSwKe2GKn9CZKcVBsylT8zC1bYRLIpaDya7E0u21g3WqIcUSQMC85AbwJo-aSc047sw8jmjYEDxOjAgMOuyxkbOQWkH4KxDxqGJoTWEdOkh/s320/Screenshot_20210102_163621.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjKYWewBeaOUX1VD4icuUhey-43cYF6rwbFybium92nrQWZ4qcevfcFyB4pGRL2ElwpA6tbEdzulVSGjkTtpRpsCnJEvyB7ozqZCCcMkbAGajInVi60QHkeyfI7UfUY35PJZfQc8rsW76u/s640/Screenshot_20210102_163525.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="598" data-original-width="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjKYWewBeaOUX1VD4icuUhey-43cYF6rwbFybium92nrQWZ4qcevfcFyB4pGRL2ElwpA6tbEdzulVSGjkTtpRpsCnJEvyB7ozqZCCcMkbAGajInVi60QHkeyfI7UfUY35PJZfQc8rsW76u/s320/Screenshot_20210102_163525.jpg" width="320" /></a></div><p>You can click and execute the program and soon graphic chart is shown.</p><p>Program execution is a little bit slow but probably maximum execution time is 10 minutes.</p><p>Please enjoy MCAP-CR system development with the new simulator.</p><p>It will greatly help the design verification.<br /></p><p>Ciao!<br /></p>MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-32517968608783495872019-06-07T15:44:00.003+09:002019-06-07T15:44:48.940+09:00Recent WorksMy blog update of this page is too few.<br />
I have been updating my Japanese blog every day for recent years, but updating this English page takes more time, I feel reluctant.<br />
<br />
Recently I am building a new 4" class MCAP-CR system.<br />
Here is the drawing of the newest system. <br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkrNLDBX-_2FcJeiFeoCOyVIe2YFueVMVebttO-eZRpxqmAkWDXUPVrES1MQ_AHt8wyrcE8vLnxpdGFGLNGts8HAOfEbc9kI4xr72U-pQ5QWDnCP_3vDwwAnMYBHvCazwxIJCE1FU2faIm/s1600/du100f-assy.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1029" data-original-width="1600" height="205" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkrNLDBX-_2FcJeiFeoCOyVIe2YFueVMVebttO-eZRpxqmAkWDXUPVrES1MQ_AHt8wyrcE8vLnxpdGFGLNGts8HAOfEbc9kI4xr72U-pQ5QWDnCP_3vDwwAnMYBHvCazwxIJCE1FU2faIm/s320/du100f-assy.png" width="320" /></a></div>
I recently pursue the simplest and the cheapest applications.<br />
This model requires least pre-cut of a plywood.<br />
Size of the plywood material is 1920 x 910 x 9.<br />
Most loudspeaker enclosure builder prefer heavy gauge woods.<br />
On the other hand, I prefer light gauge materials.<br />
Why?<br />
I do not own a car, therefore I have to transport materials by public transportation.<br />
<br />
I will again update this blog when I made the system.<br />
<br />
<br />MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-46415907518386493232017-01-29T16:09:00.000+09:002017-01-29T16:09:00.027+09:00About MCAP-CR patentI have been disclosing every detail of information of multiple-degree of freedom cavity resonator theory and applications since I applied patent to Japanese patent office.<br />
Now my friends became to use loudspeaker systems of MCAP-CR applications.<br />
<br />
I have just a few inquiries about commercial use of the patent.<br />
<br />
One was Dream SounD in France.<br />
I helped him to develop his multiple degree of freedom models for free.<br />
I wanted many people to listen to the multiple-degree of freedom cavity resonator system.<br />
It interests me more than small money by the patent.<br />
I was really sorry to have heard of his death with cancer.<br />
It shocked me a lot.<br />
<br />
I would like manufacturers to use my models and software for their development.<br />
And I would them to tell me that they would like to use it for commercial purpose.<br />
<br />
I believe multiple-degree of cavity resonator system, especially MCAP-CR, solves the biggest problems of single degree of freedom standard bass-refrex systems <br />
<br />
<ol>
<li>You now get improved resolution of low frequency with MCAP-CR.</li>
<li>You now get down to 40Hz with 3" driver and to 32Hz with 5" driver with MCAP-CR enclosure.</li>
</ol>
<br />
It can be theoretically simulated and test models may be designed and manufactured easily.<br />
My design examples are not more than test examples.<br />
Users can develop better systems with the mathematical model and simulation programs.<br />
<br />
I would like you not hesitate to ask me questions for your happy DIY lives.<br />
<br />
Visit <a href="http://mcap.webcrow.jp/">http://mcap.webcrow.jp/</a> <br />
<br />MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-4035361416703536722017-01-28T09:35:00.002+09:002017-01-28T09:35:55.549+09:00Copied design?Previous post may have not make readers understand.<br />
Here is the story.<br />
My site has contacting application to me.<br />
This application enable anyone to contact me directly through the web site: http://mcap.webcrow.jp/ .<br />
<br />
One person gave me information about suspected copy of my design.<br />
<br />
MCAP-CR is patented in Japan.<br />
Though it does not apply to some countries, but my copyright is protected.<br />
<br />
When I am asked for the use of the patented idea, I always allowed to use for free with the following conditions:<br />
<ol>
<li>Patent information and permission by the patent holder is noted.</li>
<li>Indicate the website of the patent holder.</li>
<li>Indicate the patent holder's information.</li>
<li>Use the <span style="color: red;"><b>manufacturer's original design</b></span>.</li>
</ol>
I am happy to help manufacturers to give simulation.<br />
In this case, copy of my design is suspected without permission of patent or design use.<br />
<br />
The person who reported to me suspected unauthorised use of MCAP-CR gave me the information of the website.<br />
<span style="color: red;"><b>I will be the happiest to authorize the patent use and help designing, if permission was requested</b></span>.<br />
I know that audio industry does not produce much money, therefore, I do not intend to depend on my patent.<br />
The patent is considered to be only an evidence of invention for me, therefore, I disclose any piece of technical information for free.<br />
<br />
Let us see the picture of the suspected unauthorized use:<br />
Here is their website:<br />
<a href="http://www.diapasonhifi.it/component/jshopping/diffusori/feastrex-vivace.html">http://www.diapasonhifi.it/component/jshopping/diffusori/feastrex-vivace.html</a><br />
<br />
Here is my original picture of the application:<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_YIeiig_eIQfiCIxBkzZ9NWHIKEN4WHK8X6hscgSAWo6GjfhxkLVleHODr1kJ7QvHic3rckuA73obS9_49TbnbRI7xRqgD1ldIX56G5cpRg-Cq_RfsRX441T7mrtyoimVenRRosrR7zN0/s1600/TR130c_before-painting.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_YIeiig_eIQfiCIxBkzZ9NWHIKEN4WHK8X6hscgSAWo6GjfhxkLVleHODr1kJ7QvHic3rckuA73obS9_49TbnbRI7xRqgD1ldIX56G5cpRg-Cq_RfsRX441T7mrtyoimVenRRosrR7zN0/s320/TR130c_before-painting.jpg" width="239" /></a></div>
<a href="http://mcap.webcrow.jp/drawings/TR130c-assy.pdf" target="_blank">Assembly drawing</a><br />
<br />
I cannot say if it was stolen, but looks the same.<br />
Same driver is used for the applications.<br />
<br />
I will be happy and apologize if their product is not violation of my rights.<br />
Is there anyone who knows more details about their product?<br />
<br />
<br />MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-91668606647552589972017-01-26T19:01:00.002+09:002017-01-26T19:01:44.659+09:00Mi chi ha dato una domanda?Buona sera.<br />
<br />
Ho recevuto una domanda attraverso la sistema.<br />
Penso che lui ha trovato una usa sospetta di MCAP-CR.<br />
Saro contento se qualcuno i informazioni di il sito.<br />
<br />
Grazie,<br />
<br />
<pre wrap="">[ Subject ]
mcap authorized use ?
[ Messagec ]
<a class="moz-txt-link-freetext" href="http://www.diapasonhifi.it/component/jshopping/diffusori/feastrex-vivace.html">http://www.diapasonhifi.it/component/jshopping/diffusori/feastrex-vivace.html</a></pre>
MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-52047708363669636022016-05-15T18:52:00.001+09:002016-05-15T18:53:43.104+09:00Now GUI software reloadedI had some reports that GUI software could not be downloaded.<br />
I reviewed the HTML source and replaced the files and the HTML source.<br />
Now GUI version of simulation software became available again.<br />
Visit<br />
<a href="http://mcap.webcrow.jp/software.html">http://mcap.webcrow.jp/software.html</a> .<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgAaFPaAuKLDDtvidOjEHvSbJ5I0XsJPwPh9KWr-6xdNUn95Vvc0GX6ZQgiFh8go72NNdqvgiCIQCgZQTAQZGpMfhY3moqqQlSB7lTyh71vkftBM_EUPk7VZ22f4qbMlnX6L5y0q2ZxRW7f/s1600/software..png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="277" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgAaFPaAuKLDDtvidOjEHvSbJ5I0XsJPwPh9KWr-6xdNUn95Vvc0GX6ZQgiFh8go72NNdqvgiCIQCgZQTAQZGpMfhY3moqqQlSB7lTyh71vkftBM_EUPk7VZ22f4qbMlnX6L5y0q2ZxRW7f/s320/software..png" width="320" /></a></div>
<br />
<br />
<br />MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-77661271302964348292015-06-13T08:46:00.001+09:002015-06-13T08:46:20.677+09:00Pure Audio from Poor AudioI recently devote myself to poor audio.<br />
I recognized that the most important thing of the audio hobby is technology.<br />
Important information is found everywhere around usual life.<br />
UP4D technology was found from poor audio trial.<br />
<br />
Limited materials like rough woods limited enclosure design, driver layout, size and so on.<br />
It made me realized the advantage of unparallel driver layout.<br />
<br />
Now I am trying the next UP4D application.<br />
I try UP4D cavity resonator system.<br />
Previous one was pipe resonator.<br />
<br />
Cavity resonator system is somewhat advantageous for size and shape compared with pipe resonator.<br />
<br />
Now I will incorporate pipe resonator with cavity resonator.<br />
<br />
I will see what it can.<br />
<br />MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-10003024605710660172015-03-26T20:36:00.000+09:002015-03-26T20:36:29.891+09:00Real Giant...!!!!<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiX34neHAcmZKUlRZcqsmg_rOSLF3HrqKDL9Ik-inzUvDG_vEehIjG3pE9E-vNQoiROpmFdHYj7MNo68I9V2uMA-pyDmD6mcV4lFD7Fjdc7MPYgRb-BigpQZ623S_4y9GcGGwTcAufLadul/s1600/deramsound.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiX34neHAcmZKUlRZcqsmg_rOSLF3HrqKDL9Ik-inzUvDG_vEehIjG3pE9E-vNQoiROpmFdHYj7MNo68I9V2uMA-pyDmD6mcV4lFD7Fjdc7MPYgRb-BigpQZ623S_4y9GcGGwTcAufLadul/s1600/deramsound.JPG" height="300" width="320" /></a></div>
This is the real giant.<br />
It is the first ever commercial product of multiple-degree of freedom cavity resonator type loudspeaker system!<br />
<br />
She is the president of DreamsounD where my friend devotes himself for true high-fidelity music presenter loudspeaker system.<br />
You will imagine how big it is! She is not a dwarf.<br />
<br />
Once my friend wrote to me since he got interested in MCAP-CR.<br />
He had other multiple-degree of freedom cavity resonator project.<br />
I helped him for a little bit analysis part.<br />
<br />
He was really much impressed with the performance of the model.<br />
He wrote to me that he had never experienced such presence of music with the new system.<br />
<br />
I wish I could hear it.<br />
France is too far from Japan.<br />
<br />
Visit <a href="http://dreamsound.biz/" target="_blank">DreamsounD</a> for more details.<br />
<br />
Ciao!<br />
<br />
<br />MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com1tag:blogger.com,1999:blog-7088550422621022184.post-45117013087313838532015-02-10T06:20:00.000+09:002015-02-10T06:20:03.848+09:00RRESTRICTION OF FILE SIZE OF THE WEBSITEI recently noticed that the single file size is limited to only 250kB by FC2 free website.<br />
Therefore, some simulation program files were deleted by server.<br />
I have to find how to avoid this restriction.<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfA6vLKcb9cjF9MkczMtqzuBLYzjITllKkHA6mrKS11-QGM0ukV9w6q2wQDfEn9-dd2atWVauVrqtEAcQCKXEdg3nsCcrskgsqytWQOgCplv8L0gI2yYlxgMVcjGHxWX3-zK3P4ZeRo69_/s1600/file-not-found.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfA6vLKcb9cjF9MkczMtqzuBLYzjITllKkHA6mrKS11-QGM0ukV9w6q2wQDfEn9-dd2atWVauVrqtEAcQCKXEdg3nsCcrskgsqytWQOgCplv8L0gI2yYlxgMVcjGHxWX3-zK3P4ZeRo69_/s1600/file-not-found.png" height="116" width="320" /></a></div>
<br />
I know that standard paid service can avoid this restriction;<br />
however, I do not get any money from this research!<br />
<br />
I want to use free web service, unless there comes any sponsor...<br />
<br />
I feel sad research does not make money... <br />
MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-71271507493592710512014-12-30T17:32:00.002+09:002014-12-31T09:09:44.190+09:00New Simulator ReleaseHow are your holidays?<br />
<br />
New simulator is just released.<br />
Latest simulator runs a number of simulation cases at the same time.<br />
You can just add some volume to certain chamber or adjust duct size a little bit and estimate where the best design is.<br />
<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhESKdL4L1soH9G3jBu3k_g8VNcFxFKpL2h7gZlaQjlUB-4ITcO7LzsUpR3x1Q8QOagaWc6yd_eQfzUtR6O_V8-mwHqaAf-K4ZFrPoKm9RUjJKa1dJtyFVC0DlUnpBosFlmKMMivirPyTZx/s1600/plots.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhESKdL4L1soH9G3jBu3k_g8VNcFxFKpL2h7gZlaQjlUB-4ITcO7LzsUpR3x1Q8QOagaWc6yd_eQfzUtR6O_V8-mwHqaAf-K4ZFrPoKm9RUjJKa1dJtyFVC0DlUnpBosFlmKMMivirPyTZx/s1600/plots.png" height="130" width="320" /></a></div>
Just try. It is easy.<br />
Manual is included in the package.<br />
Windows 32bit executable, additional DLL file for non MinGW users, and sample input files are included.<br />
<br />
Visit <a href="http://mcap.web.fc2.com/software.html">http://mcap.web.fc2.com/software.html</a> .<br />
<br />MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-60102380002468940852014-12-25T06:40:00.002+09:002014-12-25T06:40:41.317+09:00Merry Christmas!Do you enjoy Christmas holidays?<br />
I wish you Merry Christmas and a Happy New Year.<br />
<br />
I noticed that this blog has not been updated.<br />
I would like to resume Field Presenter Application in January.<br />
<br />
I have been struggling with the MCAP-CR simulator.<br />
It is a CUI version, but CUI version is more important simulator than GUI version.<br />
<br />
I added new feature to the DFT version simulator.<br />
Last one required users lots of executions, because it can handle only one simulation case.<br />
<br />
Next version will be able to handle a number of simulation cases.<br />
It made me easier to find effects of chamber volume, duct size variations to frequency responses.<br />
I am sure it will help designing not only MCAP-CR simulators but also double-bass-reflex.<br />
<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjllm_NQ2pFXP7yfXGV1F20R18i2h_srj0qucsbT0HZYn25S9Y6Sk8J8p1xPtiZ6i9HhQQf6Sfjwi0Fzu8mJNo8BzIKlr2cOlgBqkhVnZf0h1UhLLgI6Q0ofDqW_9kJR1sMpL5VyJIhS6rG/s1600/graph.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjllm_NQ2pFXP7yfXGV1F20R18i2h_srj0qucsbT0HZYn25S9Y6Sk8J8p1xPtiZ6i9HhQQf6Sfjwi0Fzu8mJNo8BzIKlr2cOlgBqkhVnZf0h1UhLLgI6Q0ofDqW_9kJR1sMpL5VyJIhS6rG/s1600/graph.png" height="179" width="320" /></a></div>
<br />MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-55236821556374692152014-11-14T06:40:00.001+09:002014-11-14T06:40:21.687+09:00Field Presenter Application (4)I have been studying dynamics of moving masses for multiple-degree of freedom cavity resonator applications.<br />
It is interesting, because (I have seen) no study about multiple-degree of freedom model.<br />
It is not too much difficult like continuum mechanics.<br />
Therefore, I could have developed simulator programs of multiple-degree of freedom models.<br />
<br />
On the other hand, pipe resonator model is continuum mechanics model, so that it requires another technique to develop simulator models.<br />
It is true that just calculating characteristic frequencies of pipe resonator is easy; however, using calculation formulas, we do not know exact behavior of a cavity resonator application.<br />
I will not study pipe resonator model for a time being.<br />
<br />
The reason why I adopted pipe resonator for the field presenter application was not to compensate low frequency response, but to realize slim body.<br />
Slim body is advantageous for field presentation, because slim body does not sound field as much as big enclosure body.<br />
Disadvantage of slim body was not to much compensate low frequency response.<br />
In any way, slim pipe resonator body contributed to realize tangible field presentation effect.<br />
<br />
To be continued...MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-87132393772952903372014-11-13T06:41:00.001+09:002014-11-13T06:42:29.169+09:00Field presenter application (3)<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh_5YmJBr5YM9a5mlqwaJ_aicVoGha-FwhI9r4c_SiIS28nTdp89s31GWC4h-P8XE-qdf_hrrnP8DFUIiO-NwM0DxQzwO78aBDnzSkjQwEpgyun4KEuJ9VngKNbGukNRgh0AXGhpmsGdABZ/s1600/up4d-concept.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="215" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh_5YmJBr5YM9a5mlqwaJ_aicVoGha-FwhI9r4c_SiIS28nTdp89s31GWC4h-P8XE-qdf_hrrnP8DFUIiO-NwM0DxQzwO78aBDnzSkjQwEpgyun4KEuJ9VngKNbGukNRgh0AXGhpmsGdABZ/s320/up4d-concept.png" width="320" /></a></div>
<div class="separator" style="clear: both; text-align: center;">
</div>
Here is the concept of UP4D (UnParallel 4-Direction) field presentation loudspeaker system.<br />
There are four drivers in each channel and each driver faces different direction, and height of each driver is different each other.<br />
Left channel and right channel are symmetrical.<br />
First application was pipe resonator system.<br />
Pipe resonator is advantageous to configure slim shape.<br />
This "slim" structure may be the most important factor for field presentation system.<br />
Any way, this one realized unbelievable sound field.<br />
<br />
To be continued...MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-46114586724332887182014-11-12T06:10:00.001+09:002014-11-12T06:11:09.578+09:00Field presenter application (2)<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhm1m6dlUAF-VBg44zSbcgW3RjBBAsSCZzh_esP_qKU-XkGIICVeSLbciSFGOl-61UwAZRaZ2SH_olZ_QtQ2yUhRbq7_SH1JlIRhHD9wudNOvdypJo426kJ6JIJF3BxIcNM6LZ7sANqe120/s1600/up4d-drivers.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhm1m6dlUAF-VBg44zSbcgW3RjBBAsSCZzh_esP_qKU-XkGIICVeSLbciSFGOl-61UwAZRaZ2SH_olZ_QtQ2yUhRbq7_SH1JlIRhHD9wudNOvdypJo426kJ6JIJF3BxIcNM6LZ7sANqe120/s320/up4d-drivers.jpg" width="320" /></a></div>
New field presentation loudspeaker system consists of 4 drivers per each channel.<br />
Price of one driver was just 200JPY. 200JPY corresponds to 1.74USD (1USD=115JPY).<br />
Size of the driver was nominal 7cm (smaller than 3 inches but greater than 2 inches).<br />
The reason why I chose this driver was that the price was reasonable enough.<br />
Fostex drivers cost ten times or greater.<br />
<br />
With these cheap drivers, the new field presentation loudspeaker system impressed enough.<br />
I felt it was more than loudspeaker system.<br />
It would be something else than being a loudspeaker system.<br />
Every acoustic source I chose made sound field if I were in a small concert hall.....<br />
I lost word.<br />
<br />
To be continued.MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-58740928525104274322014-11-11T06:55:00.002+09:002014-11-14T06:42:28.202+09:00Field presenter application<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjqme3-4kd3-mPhbpoO5GkjRt8FBJSMOvwyn3SjW24SR9CmICbCXaUY6Nv-H2C3NOVONkxS2vL4mCoKp9i9g-zZyN8c2WABq-mWySzPa9xmyV_GDUrEuJPZ49L601g9dSmSjtUEzXmWi0X/s1600/up4d-presentation.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjqme3-4kd3-mPhbpoO5GkjRt8FBJSMOvwyn3SjW24SR9CmICbCXaUY6Nv-H2C3NOVONkxS2vL4mCoKp9i9g-zZyN8c2WABq-mWySzPa9xmyV_GDUrEuJPZ49L601g9dSmSjtUEzXmWi0X/s1600/up4d-presentation.jpg" height="139" width="320" /></a></div>
I recently tried an application of field presentation loudspeaker system.<br />
It was a lot more than I had expected.<br />
Some group of music mania will be amazed at performance of this application and will realize that traditional approach may have been somewhat wrong...<br />
<br />
I decided to concentrate on field presentation applications and continue reporting to my Blog.<br />
<br />
to be continued...<br />
<br />MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-47996160768992993002014-11-09T09:54:00.002+09:002014-11-09T09:54:19.784+09:00Friend in FranceHello.<br />
I am trying to analyze new architecture of multiple-degree of freedom cavity resonator system.<br />
It is proposed by my friend in France.<br />
My program code has been almost complete for single-case analysis.<br />
I will add automatic multiple-case simulator feature to the CUI version program code later.<br />
What I am interested in is how the new architecture.<br />
<br />
What I found up to now are<br />
<ol>
<li>Any multiple-degree of freedom cavity resonator system has advantages than traditional single or double bass-reflex systems. </li>
<li>Most important advantage of multiple-degree of freedom system for small driver is that it adds considerable amount of pressure wave of low frequency range.</li>
<li>Most important advantage of multiple-degree of freedom system for middle or larger driver is that it removes strong character of not preferred harmonics of low frequency range.</li>
</ol>
There are more advantages.<br />
I am interested in #3 advantage.<br />
My friend had already made commercial models of multiple-degree of freedom systems:<br />
<br />
<a href="http://dreamsound.biz/" target="_blank">DreamSounD</a><br />
http://dreamsound.biz/<br />
<br />
I wish I could hear them...<br />
It is far from the far east country.<br />
<br />
<br /><br />MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-74335918943609760092014-11-03T09:29:00.001+09:002014-11-09T09:35:44.407+09:00Challenge to new multiple-degree of freedom cavity resonator systemHello dear,<br />
<br />
I seldom update my blog...<br />
I am now challenging for new multiple degree of freedom system with my friend in France.<br />
He will release some interesting systems.<br />
<br />
There have not been many updates of my research.<br />
I have some more updates in my native Japanese pages.<br />
I was convinced that my simulator model <a href="http://mcap.web.fc2.com/software.html" target="_blank">code003</a> can simulate the behavior of MCAP-CR system.<br />
It was demonstrated in the presentation of Research Institute of Loudspeaker and Related Technologies last year (<a href="http://rilsrt.web.fc2.com/meeting_2013.html" target="_blank">link in Japanese</a>).<br />
Here is what I presented in the meeting for dynamic simulation procedure below figure.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhWXk7dKX4r_KOGrvlGdyg-I96aBdDlz6PBj3q4fx_PaAYofD6E7g6rjhu3eplrIYCSsDGBUf7NQJYAAqdlX5S5_gXMtZH2VAoas11jDS8i1zbpIuCcXJOamAFhU8SKWZe0bRaMOr_O3EHM/s1600/2013-0022.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhWXk7dKX4r_KOGrvlGdyg-I96aBdDlz6PBj3q4fx_PaAYofD6E7g6rjhu3eplrIYCSsDGBUf7NQJYAAqdlX5S5_gXMtZH2VAoas11jDS8i1zbpIuCcXJOamAFhU8SKWZe0bRaMOr_O3EHM/s1600/2013-0022.JPG" height="240" width="320" /></a></div>
<br />
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</div>
My friend also presented electrical simulation model of the same system with measurement result in the same meeting:<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgO-iqWiTXNyyh6mfCGB8B27y1mZGJF6Gzqpf4rQoUOMAXbPNiWuLw_P3J43KGkHn4q5TfLnUFNltWbfE70VtDNeVBEhWQCwM51Pue8hBcNEWvffamhVyS3S7tAyZM9QhlgjiyN9WY9ju2Q/s1600/2013-0020.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgO-iqWiTXNyyh6mfCGB8B27y1mZGJF6Gzqpf4rQoUOMAXbPNiWuLw_P3J43KGkHn4q5TfLnUFNltWbfE70VtDNeVBEhWQCwM51Pue8hBcNEWvffamhVyS3S7tAyZM9QhlgjiyN9WY9ju2Q/s1600/2013-0020.JPG" height="212" width="320" /></a></div>
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See the shape and frequencies of peaks. Measurement result, my simulation and electrical simulation matched.<br />
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Now I am challenging for different architecture model, still I am now in the debugging process.<br />
The difference between the new architecture and MCAP-CR is just equations of motions.<br />
It looks easy to replace equations...<br />
<br />
I look forward to publishing the new architecture with my friend.<br />
<br />MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-33527832491504106492014-04-25T18:35:00.004+09:002014-04-25T18:35:47.863+09:00SAMPLE DRAWING ARE UPDATEDHello.<br />
<br />
It has passed 5 months since last update.<br />
There are more frequent updates in the Japanese pages, but not main page.<br />
<br />
Please visit the following page:<br />
<br />
<a href="http://mcap.web.fc2.com/drawings.html" target="_blank">SAMPLE DRAWINGS</a>.MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-59970571539578358552013-12-25T06:52:00.001+09:002013-12-25T06:52:29.909+09:00Buon Natale!Merry Christmas!<br />
<br />
How are you?<br />
I did not have big progress in loudspeaker technology development.<br />
I am creating my software document with all variable lists, used equations and algorithms.<br />
Document will be the most important to leave the record of research and development.<br />
I create the first detailed document, then begin to revise the program.<br />
<br />
I wish you Merry Christmas and a Happy New Year!<br />
<br />
ShigeruMDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-43647947492176200792013-05-20T17:47:00.000+09:002013-05-20T17:47:11.535+09:00Message form is now availableMassage form has been created.<br />
Send any private messages to me!<br />
Any feedback is appreciated.<br />
<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEget1d7xnHEwmmlgL1MSuP0XLSpsZxRVrLU6xhJNRckkegsyAgG98MRQ1pklLNHxzK3GUq2ene4P8TIgjmrTx8js1doJ4UiEnpy9-Oduh50kJpcanJ0QHENaND-K8IhjxQyzPANm6Kq_3-o/s1600/message.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEget1d7xnHEwmmlgL1MSuP0XLSpsZxRVrLU6xhJNRckkegsyAgG98MRQ1pklLNHxzK3GUq2ene4P8TIgjmrTx8js1doJ4UiEnpy9-Oduh50kJpcanJ0QHENaND-K8IhjxQyzPANm6Kq_3-o/s320/message.gif" width="234" /></a></div>
<a href="http://mcap.web.fc2.com/index.html" target="_blank">Project MCAP-CR</a><br /><br />MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-49205379878618059142013-05-02T09:27:00.000+09:002013-05-02T17:41:02.419+09:00Released: Loudspeaker Simulator with Fourier TransformNew Loudspeaker response simulator with Fourier Transform was released.<br />
This is revision 1.0. Though it is character user interface (CUI) version, but function is powerful.<br />
New simulator is applicable to <i><b>buffle</b></i>, <i><b>closed enclosure</b></i>, <i><b>bass-reflex enclosure</b></i>, <i><b>double bass-reflex enclosure</b></i>, and <i><b>standard MCAP-CR enclosure</b></i> with up to 12 subchambers!<br />
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Just to edit input parameter file, and run the simulator program from command prompt, then simulation results are generated as csv files.<br />
You may make plots, if you use spreadsheet software like (LibreOffice Calc, Microsoft Excel, etc.)<br />
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Here is an example of simulation result. It is plotted by LibreOffice Calc.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjhdsqkStPIpBMOTc4KYCspNtRfaOmyYssrA9tpu7rJ08kKDtXkHskMENTJPFHUPewIpfLXDr3XgqbNkkNfXFjXOxozFLLb2-d1W_FErKtkpnQwKCbjOUKsQu12_UTo00kSGmAoGnwb4vtp/s1600/simulation-example.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="172" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjhdsqkStPIpBMOTc4KYCspNtRfaOmyYssrA9tpu7rJ08kKDtXkHskMENTJPFHUPewIpfLXDr3XgqbNkkNfXFjXOxozFLLb2-d1W_FErKtkpnQwKCbjOUKsQu12_UTo00kSGmAoGnwb4vtp/s320/simulation-example.JPG" width="320" /></a></div>
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Below is the list of distributed files.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgWuEnI_8P9Fl-RkxaEaxUnqJ3rnlKXNiKDtyQKpOarUVXBtbPZc4F0PKcikY_CscoNyZqMvNgBCVOpsxrUPvjSdmvZBy_PXQ71sB4U7bWDF_g9j-QDG0I0WcxkbmR7oIcF-NDBHE1WMEOu/s1600/list-of-files.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="127" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgWuEnI_8P9Fl-RkxaEaxUnqJ3rnlKXNiKDtyQKpOarUVXBtbPZc4F0PKcikY_CscoNyZqMvNgBCVOpsxrUPvjSdmvZBy_PXQ71sB4U7bWDF_g9j-QDG0I0WcxkbmR7oIcF-NDBHE1WMEOu/s320/list-of-files.JPG" width="320" /></a></div>
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Here is the input file. Just to edit this file and rung the executable, then results are generated as text file.<br />
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You can compile the source file.<br />
Linux 64bit executable compiled by GCC runs much faster than Windows 32bit executable!<br />
<br />
See <a href="http://mcap.web.fc2.com/software.html" target="_blank"><span style="font-size: large;">software page</span></a>. Everyone can download the software without limitation.<br />
This version is listed as code003E.MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-39996717563727926122013-04-10T07:54:00.003+09:002013-04-10T07:55:17.174+09:00User's Guide is now attached to simulatorUser's guide is now attached to simulation softwae.<br />
This software can simulate single & double bass-reflex, and standard MCAP-CR up to three subchambers!<br />
<br />
Try it and give me your feedback!<br />
<br />
<a href="http://mcap.web.fc2.com/software.html" target="_blank"><span style="font-size: large;">Download Page</span></a>MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-87026433592524428172013-03-31T15:07:00.003+09:002013-03-31T15:08:11.772+09:00Information of QNDR System is addedInformation of QNDR System is released.<br />
QNDR details had been released ago but in Japanese only.<br />
Now you will see my web page.<br />
<br />
See <a href="http://mcap.web.fc2.com/index.html" target="_blank">Project MCAP-CR</a>.<br />
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<br />MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0tag:blogger.com,1999:blog-7088550422621022184.post-52154395126537093022013-03-28T13:02:00.002+09:002013-03-28T13:02:57.320+09:00Web site renewedMultiple Degree of Freedom Cavity Resonator Loudspeaker page is renewed.<br />
Old pages are archived and you can as well as view again.<br />
<br />
Update will be done on renewed pages only.<br />
<br />
<a href="http://mcap.web.fc2.com/index.html" target="_blank">Visit Project MCAP-CR</a>.<br />
<br />MDOFCRhttp://www.blogger.com/profile/00995851029827886364noreply@blogger.com0