SIG_YOST1996 - Generate iterated rippled noise from Yost (1996)

Usage:

outsig=sig_yost1996(delay,iterations,gn,siglen,fs)

`d`	delay in ms of the time-shifted noise adding process
`iterations`	number of iterations of the adding process
`gn`	relative gain of irn
`siglen`	signal length of irn in samples
`fs`	sampling rate in Hz

sig_yost1996(d,iterations,gn,siglen,fs) generates a signal consisting of white noise, with iterations added to itself with a delay of d (in ms).

An example:

fs = 44100;
signal = sig_yost1996(4,6,1,fs,fs);
sound(signal,fs)

W. A. Yost. Pitch strength of iterated rippled noise. The Journal of the Acoustical Society of America, 100(5):3329--3335, Nov. 1996.