A note on identifying a transmission factor in room acoustics

• Autorzy: Ohta M. , Ogawa H.
• Języki publikacji: EN

Abstrakty

EN

In this study, as a concrete example of the non-linear inverse problem in indoor sound fields, a complex sound fluctuation leaked through an aperture gap in the partition door of a coupled room under the actual sound environment has been discussed. A probability evaluation theory introducing a simple stochastic inverse system model has been proposed first especially from an object-oriented viewpoint. More concretely, in order to evaluate the output response probability distribution of the acoustic intensity in the sound receiving room, after introducing time-averaged stochastic variables, we have identified functionally the leakage property as some variability of a transmission factor. Then, we have predicted the output response probability distribution for a new arbitrary stochastic input once after establishing a prediction theory for the probability distribution of a multiplicative model. Finally, an effectiveness of the proposed theory has been experimentally confirmed too by an application to actual indoor sound field data.

Słowa kluczowe

EN

response probability prediction; inverse system model; room acoustics

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2005
• Tom: Vol. 30, No. 3
• Strony: 323--331
• Opis fizyczny: Bibliogr. 5 poz., wykr.

Twórcy

autor

Ohta M.

• Hiroshima University, Matoba 1-7-10-1106, Minami-ku, Hiroshima City, 732-0824 Japan

autor

Ogawa H.

• Prefectural University of Hiroshima, Faculty of Management and Information Systems, Ujina-Higashi 1-1-71, Minami-ku, Hiroshima City, 734-8558 Japan

Bibliografia

• [1] SATO Y., Adaptive digital signal processing - linear and equivalent theory [in Japanese], 33-57, Maruzen, Tokyo 1990.
• [2] OHTA M., HIROMITSU S., YAMAGUCHI S., HATAKEYAMA K., An effect of additional noise on the level distribution of composite noise, J. Acoust. Soc. Jpn., 31, 2, 89-91 (1975).
• [3] OHTA M., IKUTA A., A generalization of regression analysis based on the introduction of Mellin transform type characteristic function and its practical application to sound insulation system [in Japanese], J. Acoust. Soc. Jpn., 49, 7, 487-492 (1993).
• [4] Ohtsuki Trans., Mathematical formula collection [in Japanese], Maruzen, Tokyo 1983.
• [5] OHTA M., KOIZUMI T., General statistical treatment of the response of a non-linear rectifying device to a stationary random input, IEEE Trans. Information Theory, IT-14, 4, 595-598 (1968).