I am trying to understand what a sound burst will look like after frequency dependent attenuation.
I come from engineering / signal processing not physics background.
If I am told as an engineer to mathematically attenuate high frequency I would apply a filter to the signal. This results (typically) in a new signal which is longer in the time domain than the original.
Is this what happens, i.e. do physical waves, if experiencing frequency dependent attenuation, elongate in time; or is a FIR filter not a good approximation of physical attenuation? (by physical waves I do not necessarily in human audible range)