Prediction of Low-Frequency Sound Field in Rooms with Complex-Valued Boundary Conditions on Walls
2019
scientific article
english
- room acoustics
- modal vibrations
- room impulse response
- complex wall impedance
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.
2019127-1 - 2019127-8
CC BY (attribution alone)
public
40
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