tom@516: function ERB = ERB_Hz(CF_Hz, ERB_break_freq, ERB_Q)
tom@516: % function ERB = ERB_Hz(CF_Hz, ERB_break_freq, ERB_Q)
tom@516: %
tom@516: % Auditory filter nominal Equivalent Rectangular Bandwidth
tom@516: %	Ref: Glasberg and Moore: Hearing Research, 47 (1990), 103-138
tom@516: % ERB = 24.7 * (1 + 4.37 * CF_Hz / 1000);
tom@516: 
tom@516: if nargin < 3
tom@516:   ERB_Q = 1000/(24.7*4.37);  % 9.2645
tom@516:   if nargin < 2
tom@516:     ERB_break_freq = 1000/4.37;  % 228.833
tom@516:   end
tom@516: end
tom@516: 
tom@516: ERB = (ERB_break_freq + CF_Hz) / ERB_Q;