🚀 go-pugleaf

In article <1992Nov17.012614.20277@athena.mit.edu> philo@athena.mit.edu (philo) writes:
>lecturer once. One of the things that he said was that a spectrum analysis of the
>speach right near the ear of the listener did not agree with the spectrum of the
>sound as it left the mouth of the person who is talking. However, the fourrier
>components agreed to a large degree.
>
>Does any one have a better understanding of this concept that I do? I think
>this could be a very interesting question.
>-philo.
>dakhlak.... hawn nazl s suruur?
>				(Ziad)


Unless you were in an anechoic chamber, the reverberent field will always
change the frequency content of any acoustic signal.  High frequencies will
be attenuated by the air in the path from source to ear.  Also, the microphone
used to get the acoustic signal into the Fourier analyzer has a non-flat
frequency response.

I am ignoring the fact that FFT's done on non-infinite (in time) signals are
suspect in their validity.

Galen Watts