
A query to the selected Intensity object.
the mean (in dB) of the intensity values of the frames within a specified time domain.
If the averaging method is dB, the mean intensity between the times t_{1} and t_{2} is defined as
1/(t_{2}  t_{1}) ∫_{t1}^{t2} x(t) dt 
where x(t) is the intensity as a function of time, in dB. If the method is energy, the result is
10 log_{10} { 1/(t_{2}  t_{1}) ∫_{t1}^{t2} 10^{x(t)/10} dt } 
If the method is sones, the result is
10 log_{2} { 1/(t_{2}  t_{1}) ∫_{t1}^{t2} 2^{x(t)/10} dt } 
After you do Sound: To Intensity..., the mean intensity of the resulting Intensity, if the averaging method is energy, should be close to the mean SPL of the original Sound, which can be found with Info.
© ppgb, November 7, 2004