I have a circuit with a MEMS microphone and would like to be able to measure the audio noise spike contents and check the noise floor power level in the audio circuit.
My intention is to connect the oscilloscope to the MEMS microphone but before that I would like to know the procedure to analyse the signal shown in the oscilloscope. This is, do measurements need to be done in specific ambient control? Is it necessary to use a specific audio signal for the MEMS microphone to receive and transduce?
On the other hand, maybe using audio fft analysis tools could help. Is there a free one that can be use for this purpose?