Multiple-Degree of Freedom Cavity Resonator Diary

I am glad to announce that conference of Research Institute of Loudspeaker System and Related Technologies (RILSRT) will be held on September 4th in Tokyo . Number of members of this research group became to 81. We will meet each other and discuss technologies and preferences. Please let me know if you are interested in this conference this year! Multiple-Degree of Freedom Cavity Resonator Project

Here is myself. I presented three types of MDOF-CR(Multiple-Degree of Freedom Cavity Resonator) applications. Three applications are: 1) Standard MCAP-CR 2) CBS-CR 3) AICC-CR These are true MDOF-CR applications. More detailed information is in Japanese only. I will upload them in English later. When? I am not sure.. These applications have exactly the same appearances as in the left photographs. These applications impressed the attendees because of powerful low frequency response with small 3" full-range drivers (TB W3-881SJ).

Here is Mr. Ishida's system. He is well-known craft master. He brought standard 2 way bass-reflex system. Though his work was standard 2 way, there was no contaminated sound felt to me. I am sorry that there was no proper stands, my work was used as system stand. His standard 2 way regenerated excellent sound. We have to always come back to basics. It was what his work let me know. Mr. Furudate brought 4" co-axial 2 way speaker system. Cabinet type was standard MCAP-CR. Material of cabinet is vinyl pipe. This made its sound more vivid. His system generated vivid sound. It was tuned to fit pops sound rather than classical musics. Frequency range was wide enough from very low (40Hz and lower) to very high (may be 20kHz). Continued Multiple-Degree of Freedom Cavity Resonator Project

I am heading a small group named "Research Institute of Loudspeaker Systems and Related Technologies(RILSRT)". First conference was held on September 23rd, 2010 in Tokyo. It was open conference to public and anyone who wanted to join was able to join the conference. Twenty-six people came to present or just to audit the conference. This is presentation by Mr. Matsu. He is co-founder of this institute. This huge system is aimed to realize acoustic field using one 12" and two 10" full-range drivers for each channel. Its technology was based on NDR (Non-Dimensional Radiation) System developed by Mr. Kono in Japan. Enclosure type is standard MCAP-CR developed by myself.. Acoustic field was truly wondering. Regenerating chamber orchestra, acoustic field was spread not only forward field but also backward field. Size of violin was small enough and did not spread over while using these drivers. It was amazing work. Everyone who presented liked this system. Proble...

 I am heading a small society named "Research Institute of Loudspeaker Systems and Related Technologies (see link ).  It pursues developing and publishing useful technologies. There are many professional engineers and researchers worldwide; however, no professional has ever got success in multiple degree of freedom cavity resonator area.   Above picture is my memorandum notebooks. I always bring a small notebook in order to record my ideas. I illustrate my multiple degree of freedom models and momentum equations. These notebooks are some of my records of MDOF-CR development. Idea of models, equations, algorithms and hand-written drawings are recorded in these notebooks. I think audio professionals should lead technologies; however, non-professionals are already go ahead from professionals in some area. Therefore my group have reasons of its existence. Multiple-Degree of Freedom Cavity Resonator Project