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xMoRioPLx t1_j5u8or9 wrote

I understand it as delay made by reference sound bouncing back to input from some kind of wall.

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xMoRioPLx t1_j5u90sx wrote

Oh and tbh no computer or anything can create sound instantly and make it instantly disappear so there is always some imperfections.

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TaliskerBay22 t1_j5uys2g wrote

This does not exactly matter as long as the instrument that creates the impulse and the instrument that measures the impulse response are much faster than the system that is under test. In this case a function generator can easily go to 100 KHz so it is much faster than the headphone, also the microphone that measures the response is much faster than the headphone so you are ok.

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