Comparaison of 2 audio signals and calculation of filter

Hi everyone,

For a linguistics experiment, I have loudspeakers playing sounds in a room and they are directed towards a wall, which acts as a low pass filter when you hear the sounds in the neighbouring room (where I am making recordings with my experimental subjects). The goal is to see the influence of ambient sounds on speech.

It would be very nice if i could actually know more about the filtering effect of the wall: what i would like to do is to compare the two audio signals (the one in the room with the loudspeakers and the one in the neighbouring room) and then output the filter function.

Does anybody has any idea on how to do this? Is there a built in function in Matlab for example?

This is my first post on this forum amd I have a linguistics background with very basic notion of DSP so i am sorry if this question sounds really dumb.

Regards,
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