Patent ID: 7680289

Claim:
A method of performing a head related transfer function comprising the step of: performing a cascade of at least one resonator and at least one anti-resonator; said step of performing at least one resonator includes performing a resonator for each peak in a magnitude spectrum of the head related transfer function having a frequency peak corresponding to said peak in the magnitude spectrum of the head related transfer function and selecting a bandwidth of said resonator to minimize a difference from the magnitude spectrum of the head related transfer function employing the equation: y ( n )= Ax ( n )+ By ( n− 1)+ Cy ( n− 2) where: C=−e (−2π·BW·T) ; B=2e (−π·BW·T) cos(2π·F·T); and A=1−B−C; BW is the bandwidth of the peak in Hertz; T is the sampling period; and F is the resonant frequency in Hertz; said step of performing at least one anti-resonator includes performing an anti-resonator for each valley in the magnitude spectrum of the head relates transfer function significantly smaller in magnitude than natural valleys between peaks of said resonators.