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annotate trunk/matlab/bmm/carfac/ERB_Hz.m @ 516:68c15d43fcc8

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Added MATLAB code for Lyon's CAR-FAC filter cascade.
author tom@acousticscale.org
date Wed, 15 Feb 2012 21:26:40 +0000
parents
children aa282a2b61bb
rev   line source
tom@516 1 function ERB = ERB_Hz(CF_Hz, ERB_break_freq, ERB_Q)
tom@516 2 % function ERB = ERB_Hz(CF_Hz, ERB_break_freq, ERB_Q)
tom@516 3 %
tom@516 4 % Auditory filter nominal Equivalent Rectangular Bandwidth
tom@516 5 % Ref: Glasberg and Moore: Hearing Research, 47 (1990), 103-138
tom@516 6 % ERB = 24.7 * (1 + 4.37 * CF_Hz / 1000);
tom@516 7
tom@516 8 if nargin < 3
tom@516 9 ERB_Q = 1000/(24.7*4.37); % 9.2645
tom@516 10 if nargin < 2
tom@516 11 ERB_break_freq = 1000/4.37; % 228.833
tom@516 12 end
tom@516 13 end
tom@516 14
tom@516 15 ERB = (ERB_break_freq + CF_Hz) / ERB_Q;