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Convention Paper

Quasi-Anechoic Loudspeaker Measurement Using Notch Equalization for Impulse Shortening

Authors: Stroud, Richard

AES Convention 129 · Paper 8170 · November 2010

Abstract

The length of the impulse response of a typical piston driver is largely determined by the characteristic second-order high-pass response of the driver. This time response makes anechoic (i.e. gated) measurement difficult in non-anechoic environments, as reflections must be suppressed to returns of 30 ms. or longer.

This paper outlines a quasi-anechoic frequency and phase response modification technique using a tuned notch, or band-cut, equalization that shortens the impulse response and allows correct full-range speaker measurement in moderately sized non-anechoic rooms.

Details

Published in
AES Convention 129
AES Convention
129
Paper number
8170
Publication date
November 6, 2010
Session subject
Acoustical Measurements
Affiliation
Stroud Audio Inc., Kokomo, IN, USA (See document for exact affiliation information.)
Type
Convention Paper