Pressure

How to find Leq for a WAV audio file like an SPL Meter would?

How to find Leq for a WAV audio file like an SPL Meter would?
  1. How can I tell the frequency of a WAV file?
  2. How to calculate sound pressure level in matlab?

How can I tell the frequency of a WAV file?

If you have a . wav file you can calculate the frequency directly. If the file is a single pure tone simply count n the number of samples between successive 0 crossings and divide 44.1/n to get the frequency in kHz. If the file is a mix of tones then you will need to do a Fourier transform.

How to calculate sound pressure level in matlab?

Calculate sound pressure level (in dB) of given pressure signal 'p_Pa'. spl_dB = spl(p_Pa,ref) returns sound pressure level in decibels referenced to reference pressure |ref| in pascals. This usage returns a scalar value of spl_dB for the entire p_Pa signal.

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