Application of high-density sound absorbing materials for improving low-frequency spectral flatness in room response

• Autorzy: Meissner Mirosław

Identyfikatory

DOI

10.21008/j.0860-6897.2021.1.11

• Języki publikacji: EN

Abstrakty

EN

A room impulse response obtained for complex-valued boundary conditions on wall surfaces was used to determine the frequency response of arbitrary shaped room. Based on theoretical findings, a numerical procedure was developed to test the effectiveness of a high-density sound absorbing material in improving low-frequency spectral flatness. The impedance of absorbing material was determined using the two-parameter Komatsu model. The simulation results have shown that the smoothing effect of the frequency response becomes apparent when the thickness of absorbing material is large enough. This is because as the material thickness increases, the sound absorption tends to increase at lower frequencies.

Słowa kluczowe

EN

frequency response of room; spectral flatness; room impulse response; wall impedance

PL

pasmo przenoszenia w pomieszczeniu; płaskość widmowa; odpowiedź impulsowa pomieszczeń; impedancja ściany

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2021
• Tom: Vol. 32, nr 1
• Strony: art. no. 2021111
• Opis fizyczny: Bibliogr. 19 poz., 1 rys., wykr.

Twórcy

autor

Meissner Mirosław

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

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).