Prediction of low-frequency sound field in rooms with complex-valued boundary conditions on walls

• Autorzy: Meissner Mirosław
• Języki publikacji: EN

Abstrakty

EN

A modal representation of a room impulse response has been used to formulate expressions for low-frequency sound field in rooms of arbitrary shape. Based on theoretical results, a simulation program has been developed to predict a sound pressure distribution and a room transfer function for rectangular enclosure having walls covered by a material of complex impedance. Calculation results have shown that changes in the wall reactance entail a substantial modification of a sound pressure distribution. Furthermore, an influence of wall reactance on the room transfer function was investigated and it was discovered that a change in a reactance sign causes a shift in frequencies of modal vibrations excited in the room.

Słowa kluczowe

EN

room acoustics; modal vibrations; room impulse response; complex wall impedance

PL

akustyka pomieszczeń; drgania modalne; metoda wymuszeń impulsowych

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2019
• Tom: Vol. 30, nr 1
• Strony: art. no. 2019127
• Opis fizyczny: Bibliogr. 15 poz., wykr.

Twórcy

autor

Meissner Mirosław

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland

Bibliografia

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• 15. S. Damelin, W. Miller, The mathematics of signal processing, Cambridge University Press, New York, 2012.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).