pytimbre.utilities.audio_filtering.ac_filter_design

pytimbre.utilities.audio_filtering.ac_filter_design(fs)

AC_Filter_Design.py

Created on Mon Oct 18 19:27:36 2021

@author: Conner Campbell, Ball Aerospace

Description

coefficients_a, coeff_c = AC_Filter_Design(fs)

returns ba, aa, and bc, ac which are arrays of IRIR filter coefficients for A and C-weighting. fs is the sampling rate in Hz.

This program is a recreation of adsgn and cdsgn by Christophe Couvreur, see Matlab FEX ID 69.

param fs:

sampling rate in Hz

type fs:

double

returns:

  • coefficients_a (list) – List of two numpy arrays, feedforward and feedback filter coefficients for A-weighting filter. Form of lists is [ba,aa]

  • Coeff_c (list) – List of two numpy arrays, feedforward and feedback filter coefficients for C-weighting filter. Form of lists is [bc,ac]

  • Code Dependencies

  • ——-

  • This program requires the following python packages

  • scipy.signal, numpy

References

IEC/CD 1672: Electroacoustics-Sound Level Meters, Nov. 1996.

ANSI S1.4: Specifications for Sound Level Meters, 1983.

ACdsgn.m: Christophe Couvreur, Faculte Polytechnique de Mons (Belgium) couvreur@thor.fpms.ac.be