Weighting

Weightings according to IEC 61672-1:2003.

acoustics.weighting.THIRD_OCTAVE_A_WEIGHTING = array([-63.4, -56.7, -50.5, -44.7, -39.4, -34.6, -30.2, -26.2, -22.5, -19.1, -16.1, -13.4, -10.9, -8.6, -6.6, -4.8, -3.2, -1.9, -0.8, 0. , 0.6, 1. , 1.2, 1.3, 1.2, 1. , 0.5, -0.1, -1.1, -2.5, -4.3, -6.6, -9.3])

A-weighting filter for preferred 1/3-octave band center frequencies, as specified in acoustics.bands.THIRD_OCTAVE_CENTER_FREQUENCIES.

acoustics.weighting.THIRD_OCTAVE_C_WEIGHTING = array([-11.2, -8.5, -6.2, -4.4, -3. , -2. , -1.3, -0.8, -0.5, -0.3, -0.2, -0.1, 0. , 0. , 0. , 0. , 0. , 0. , 0. , 0. , 0. , -0.1, -0.2, -0.3, -0.5, -0.8, -1.3, -2. , -3. , -4.4, -6.2, -8.5, -11.2])

C-weighting filter for preferred 1/3-octave band center frequencies, as specified in acoustics.bands.THIRD_OCTAVE_CENTER_FREQUENCIES.

acoustics.weighting.a_weighting(first, last)

Select frequency weightings between first and last centerfrequencies from A-weighting. Possible values for these frequencies are third-octave frequencies between 12.5 Hz and 20,000 Hz (including them).

first : scalar

First third-octave centerfrequency.

last : scalar

Last third-octave centerfrequency.

NumPy array with A-weighting between first and last centerfrequencies.

acoustics.weighting.c_weighting(first, last)

Select frequency weightings between first and last centerfrequencies from C-weighting. Possible values for these frequencies are third-octave frequencies between 12.5 Hz and 20,000 Hz (including them).

first : scalar

First third-octave centerfrequency.

last : scalar

Last third-octave centerfrequency.

NumPy array with A-weighting between first and last centerfrequencies.

acoustics.weighting.z2a(levels, first, last)

Apply A-weighting to Z-weighted signal.

acoustics.weighting.a2z(levels, first, last)

Remove A-weighting from A-weighted signal.

acoustics.weighting.z2c(levels, first, last)

Apply C-weighting to Z-weighted signal.

acoustics.weighting.c2z(levels, first, last)

Remove C-weighting from C-weighted signal.

acoustics.weighting.a2c(levels, first, last)

Go from A-weighted to C-weighted.

acoustics.weighting.c2a(levels, first, last)

Go from C-weighted to A-weighted.