maad.spl.volt2pressure

maad.spl.volt2pressure(volt, gain, sensitivity=-35, dBref=94)[source]

Convert Volts to instantaneous sound pressure (p [Pa]).

Parameters:

voltndarray-like or scalar: ndarray-like or scalar containing the sound waveform in volt
gaininteger: Total gain applied to the sound (preamplifer + amplifier)
sensitivityfloat, optional, default is -35 (dB/V): Sensitivity of the microphone
dBrefinteger, optional, default is 94 (dBSPL): Pressure sound level used for the calibration of the microphone (usually 94dB, sometimes 114dB)

Returns:

pndarray-like or scalar: ndarray-like or scalar containing the sound waveform in pressure (Pa)

Examples

>>> w, fs = maad.sound.load('../data/cold_forest_daylight.wav') 
>>> v = maad.spl.wav2volt(wave=w)
>>> maad.spl.volt2pressure(volt=v, gain=42) 
    array([ 0.00481491,  0.00574187,  0.00576913, ..., -0.00185099,
    -0.00097856, -0.00168741])   

Same result with the function wav2pressure

>>> maad.spl.wav2pressure(wave=w, gain=42)
    array([ 0.00481491,  0.00574187,  0.00576913, ..., -0.00185099,
    -0.00097856, -0.00168741])