An approximate transfer function for the dual-resonance nonlinear filter model of auditory frequency selectivity.
The dual-resonance nonlinear filter [Meddis et al., J. Acoust. Soc. Am. 109, 2852-2861 (2001)] was presented as a digital time-domain algorithm to model nonlinear auditory frequency selectivity. This report extends previous work by presenting an approximate analytic transfer function that allows calculating and analyzing its level-dependent frequency-domain response. The transfer function is derived on the assumption that the filter behaves linearly for any given input amplitude. It matches accurately the response (gain and phase) of the digital filter for tones. Practical uses for the transfer function are suggested.
Instituto de Neurociencias de Castilla y León, Universidad de Salamanca, Avenida Alfonso X El Sabio s/n, 37007 Salamanca, Spain. ealopezpoveda@usal.es
Enrique A
EA
Lopez-Poveda
D000465:Algorithms; D001489:Basilar Membrane / Q000502:physiology; D003056:Cochlear Nerve / Q000502:physiology*; D005583:Fourier Analysis; D006801:Humans; D008432:Mathematical Computing; D008959:Models, Neurological; D017711:Nonlinear Dynamics; D010897:Pitch Discrimination / Q000502:physiology*; D012815:Signal Processing, Computer-Assisted; D013018:Sound Spectrography