Visualize sound from your Android's microphone. Technical specification: Recording. Sample rate: 44100 Mono. Chart buffer: 5 seconds. Decibel Level. Reference pressure p0 = 20uPa. decibel equation: 20 x Log10 Frequency Spectrum. Hanning Window. FFT size: 4410 Overlapping: 80%. Frequency: 1 Hz 4 KHz over 64 groups. Credits: JTransforms for FFT calculations.
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