java - Android Heart beat recording apps -

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i doing android app analyze our heart beat rate recording sound. while apps recorded user heart beat sound in audio file, have no idea how algorithm analyze heart rate, can in fft??

what audio file contain? did record heart beat holding smartphone on heart?

you should implement noise reduction , try main beat repeating loudest peak point in recording.

fft give frequency of signal energy (loudest) counting peaks should bring same solution.

but before start implementing anything. listen recording , ask yourself, if can hear heartbeats. ears 1 of best noise reduction systems in world. if cant hear it, neither fft nor other algorithm it.


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