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Convention Paper

Log Sampling in Time and Frequency: Preliminary Theory and Application

Authors: Keele, Jr., D. B. (Don)

AES Convention 97 · Paper 3935 · November 1994

Abstract

The impulse response of real-world physical systems decays faster at high frequencies than low frequencies. This is due to the approximately constant Q behavior of the resonators that often make up these systems. Considerable efficiency can be obtained in digitizing, storing, and manipulating impulse-response data that has been sampled at a rate that starts high initially, and then falls inversely with time. This paper explores the concept, and develops an efficient log-log time-frequency transform that converts back and forth directly between log-spaced time samples and log-spaced frequency samples. A very efficient FIR convolver/equalizer configuration with logarithmically spaced time taps is described.

Details

Published in
AES Convention 97
AES Convention
97
Paper number
3935
Publication date
November 6, 1994
Affiliation
DBK Associates, Elkhart, IN ; Techron, Div. Crown International, Inc., Elkhart, IN ; Audio Magazine, Hachette Filipacchi Magazines, Inc., New York, NY (See document for exact affiliation information.)
Type
Convention Paper