www.gusucode.com > 语音信号的分析源码程序 > 语音信号的分析源码程序/scramble/ERBSpace.m
function cfArray = ERBSpace(lowFreq, highFreq, N) % function cfArray = ERBSpace(lowFreq, highFreq, N) % This function computes an array of N frequencies uniformly spaced between % highFreq and lowFreq on an ERB scale. N is set to 100 if not specified. % % See also linspace, logspace, MakeERBCoeffs, MakeERBFilters. % % For a definition of ERB, see Moore, B. C. J., and Glasberg, B. R. (1983). % "Suggested formulae for calculating auditory-filter bandwidths and % excitation patterns," J. Acoust. Soc. Am. 74, 750-753. if nargin < 1 lowFreq = 100; end if nargin < 2 highFreq = 44100/4; end if nargin < 3 N = 100; end % Change the following three parameters if you wish to use a different % ERB scale. Must change in MakeERBCoeffs too. EarQ = 9.26449; % Glasberg and Moore Parameters minBW = 24.7; order = 1; % All of the followFreqing expressions are derived in Apple TR #35, "An % Efficient Implementation of the Patterson-Holdsworth Cochlear % Filter Bank." See pages 33-34. cfArray = -(EarQ*minBW) + exp((1:N)'*(-log(highFreq + EarQ*minBW) + ... log(lowFreq + EarQ*minBW))/N) * (highFreq + EarQ*minBW);