using
Sabines formula for reverbaration time
Jaeger's
method
Answers
Explanation:
Sabine’s Formula
This method is based on the principle of diffuse acoustic field and let you evaluate the reverberation time thanks to the formula below:
T60 = 0,161 * (V/A)
In this formula, the value of T60 is expressed in seconds, V indicates the volume of the analyzed room (expressed in m3), and A is the equivalent absorption surface (expressed in m2).
The equivalent absorption surface (A) is calculated with the formula below:
A= ∑(αi*si)
In this formula, si represents the absorbing areas and αi is the sound absorbing coefficients of these surfaces, for specific frequencies (usually 500 or 1000 Hz).
The sound absorbing coefficient is a characteristic of any surface and generally it is specified in the technical sheets or certifications of construction materials.