Source microphone input
FFT analyser
Now we have Array of 512 elements with values from 0 to 255
pow = Frequency power spectrum
var = variance [power diference]
pow(n) - pow(n-1)
nl = noise level (room signal)
if pow > nl + 5000 (some constant we add to noise level) we try to grab maximum detected variance (= var_max)on positive variance spike. As soon as variance spike hits in negative direction we check if next 4 variances are inside interval +varmax * 0,4 and -varmax * 0,4.
If fast event hasn't triggered .... Check if next 35 pow > nl + 5000 and all variances are bigger than -3000
pow < nl + 2000 and variance spike negative > varmax * 0,4 * 0,5
If fast event hasn't triggered .... Check if next 35 pow < nl + 2000
No ExhelationFrequency amplitude window
.... false Frequency amplitude variance
Copy all data into Excel or Spreadsheet go to Data > text to columns and separate by | character