Appendix 5: Deriving the Reverberation Time Equation for Different Frequencies and Surfaces

In real rooms, we must also allow for the presence of a variety of different materials, as well as accounting for their variation of absorption as a function of frequency. This is complicated by the fact that there will be different areas of material with different absorption coefficients, and these will have to be combined in a way that accurately reflects their relative contribution. For example, a large area of a material with a low value of absorption coefficient may well have more influence than a small area of material with more absorption. In the Sabine equation, this is easily done by multiplying the absorption coefficient of the material ...

Get Acoustics and Psychoacoustics, 5th Edition now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.