Simulation of room acoustics using Comsol Multiphysics

Abstract

The modeling programs provide a wide range of possibilities for simulating acoustic systems. This paper describes programs used in acoustics for various purposes, such as Sound PLAN, AFMG SoundFlow, WinFLAG, Comsol multiphysics, ANSYS, Roomsim. For the purposes of the current research, the acoustic simulation of the room was carried out. Physical parameters as impedance, sound hard boundary and normal velocity were considered. The sound pressure level in rooms was investigated. Possibilities of using Comsol Multiphysics in the research of acoustics were investigated. Results of the current research show high-frequency eigenmodes located in the corners of the room and in the center of the room. Sound pressure level increased from low to medium frequency and then decreased with frequency drifts. At the frequency of 5000 Hz, minimum sound pressure is observed, which is associated with the decrease in the wavelength co-occurring with the decrease in frequency.

Modeliavimo programos suteikia daugybę galimybių imituoti akustines sistemas. Šiame straipsnyje buvo apžvelgtos programos, naudojamos įvairiems akustinių parametrų modeliavimo tikslams pasiekti. Aprašytos tokios programos, kaip Sound PLAN, AFMG Sound Flow WinFLAG, Comsol multiphysics, ANSYS, Roomsim. Nagrinėjamas pavyzdys rodo akustinių rodiklių patalpoje modeliavimą. Buvo atsižvelgta į patalpos parametrus, garso lygį, garso sklaidos greitį ir kt. Pateiktos galimybės naudotis programa Comsol Multiphysics. Tyrimų rezultatai parodė, kad aukščiausias dažnis būdavo nustatomas kambario kampuose ir centre. Nustatytas garso slėgio lygio padidėjimas esant žemo ir vidutinio dažnio diapazonui. Esant 5000 Hz dažniui, užfiksuotas mažiausias garso slėgis, kuris susijęs su bangos ilgiu.