Bands

acoustics.bands.octave(first, last)

Generate a Numpy array for central frequencies of octave bands.

There are more information on how to calculate ‘real’ bands in http://blog.prosig.com/2006/02/17/standard-octave-bands/

first : scalar

First octave centerfrequency.

last : scalar

Last octave centerfrequency.

octave_bands : array

An array of centerfrequency octave bands.

acoustics.bands.octave_high(first, last)

Upper cornerfrequencies of octaves.

acoustics.bands.octave_low(first, last)

Lower cornerfrequencies of octaves.

acoustics.bands.third(first, last)

Generate a Numpy array for central frequencies of third octave bands.

first : scalar

First third octave centerfrequency.

last : scalar

Last third octave centerfrequency.

octave_bands : array

An array of centerfrequency third octave bands.

acoustics.bands.third2oct(levels, axis=None)

Calculate Octave levels from third octave levels.

Parameters:

• levels – Array containing third octave levels.
• axis (int) – Axis over which to perform the summation.

Type:

np.ndarray

Returns:

Third octave levels

Return type:

np.ndarray

Note

The number of elements along the summation axis should be a factor of 3.

acoustics.bands.third_high(first, last)

Higher cornerfrequencies of third-octaves.

acoustics.bands.third_low(first, last)

Lower cornerfrequencies of third-octaves.