AES Berlin 2014
Tutorial T13

Monday, April 28, 13:30 — 14:30 (Estrel Hall C1)


T13 - Perceptually Motivated Filter Design with Applications to Loudspeaker-Room Equalization

Bal√°zs Bank, Budapest University of Technology and Economics - Budapest, Hungary

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.

AES Technical Council This session is presented in association with the AES Technical Committee on Signal Processing and AES Technical Committee on Loudspeakers and Headphones

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EXHIBITION HOURS April 26th   10:00 - 18:30 April 27th   09:00 - 18:30 April 28th   09:00 - 18:30 April 29th   09:00 - 14:00
REGISTRATION DESK April 26th   09:30 - 18:30 April 27th   08:30 - 18:30 April 28th   08:30 - 18:30 April 29th   08:30 - 16:30
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AES - Audio Engineering Society