Some noise cancellation and prediction methods on the response probability distribution form for complicated sound wall systems with background noise

• Autorzy: Ohta M. , Takaki N.
• Języki publikacji: EN

Abstrakty

EN

In the actual situation of measuring an environmental noise, it is very often that only the resultant stochastic fluctuation contaminated by an additional noise of arbitrary distribution type can be observed. In this paper at first a noise cancellation for reasonably removing the effect of the above additional noise, especially in a whole probability distribution form, is derived theoretically in order to estimate only the undisturbed objective output response. Next, for the purpose of predicting a whole expression form of the output response probability of an acoustic system excited by an arbitrary stochastic input with the additional noise, a new stochastic signal processing method, reflecting the effect of the additional noise fluctuation, is proposed in a whole probability distribution form. The effectiveness of the proposed theoretical methods is experimentally confirmed too by applying them to the actual data measured in the complicated sound wall systems.

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2001
• Tom: Vol. 26, no. 4
• Strony: 293--304
• Opis fizyczny: Bibliogr. 5 poz., rys., tab.

Twórcy

autor

Ohta M.

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

autor

Takaki N.

• Department of Electronics Eng., Faculty of Eng., Hiroshima Kokusai Gakuin University (6-20-1, Nakano, Aki-ku, Hiroshima City, 739-0321 Japan)

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

Bibliografia

• 1. A. London, Transmission of reverberant sound through double walls, J. Acoust. Soc. Am., 22, 270-279 (1950).
• 2. M.J. Crocker and A.J. Price, Sound transmission using statistical energy analysis, J. Sound Vib., 9, 469-486 (1969).
• 3. M. Ohta and H. Yamada, A simple method for predicting the output energy distribution of an arbitrary sound insulation system by use of the least-squares method [in Japanese], J. Acoust. Soc. Jpn., (J)39, 756-765 (1983).
• 4. M. Ohta and N. Takaki, A practical estimation and prediction method of response probability distribution for arbitrary sound environmental systems with background noise and its application to the sound wall system, J. Acoust. Soc. Jpn. (E)17, 3, 121-126 (1996).
• 5. M. Ohta and T. Koizumi, General statistical treatment of the response of a nonlinear rectifying device to a stationary random input, IEEE Trans. Inf. Theory, IT-14, 595-598 (1969).