Tuesday, May 23, 14:30 — 15:15 (Salon 4+5 London)
Balázs Bank (Presenter)
Digital filters are often used to model or equalize acoustic or electroacoustic transfer functions. Applications include headphone, loudspeaker, and room equalization, or modeling the radiation of musical instruments for sound synthesis. As the final judge of quality is the human ear, filter design should take into account the quasi-logarithmic frequency resolution of the auditory system. This tutorial presents various approaches for achieving this goal, including warped FIR and IIR, Kautz, and fixed-pole parallel filters, and discusses their differences and similarities. It also shows their relation to fractional-octave smoothing, a method used for displaying transfer functions. With a better allocation of the frequency resolution and filtering resources, these methods require a significantly lower filter order compared to straightforward FIR and IIR designs at a given sound quality.
This session is presented in association with the AES Technical Committee on Loudspeakers and Headphones