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Global Parameters
Air temperature: 20 °C Air pressure: 101325 Pa Model: Allard & Champoux (1992) |
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This calculator estimates the absorption coefficient of a porous aborbent in front of a rigid backing (such as a solid wall) with an optional air gap between the absorbent and the backing. Up to two absorbers can be modelled at once. The input parameters are as follows:
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Technical Information
The formulae used by the calculator have been taken from the following sources:
Trevor J. Cox and Peter D'Antonio. 2009. Acoustic Absorbers and Diffusers: Theory, design and application, 2nd Edition. Taylor & Francis.
J. F. Allard and Y. Champoux. 1992. New empirical equations for sound propagation in rigid frame fibrous materials. J. Acoust. Soc. Am., 91(6), 3346-53.
Note: This calculator makes no attempt to estimate excess absorption at the edges of a finite sample. Random incidence absorption coefficients estimated using the calculator are therefore likely to be lower than those measured in a reverberation chamber.
System Requirements
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