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Convention Paper

Nonlinear Versus Parametric Effects in Compression Drivers

Authors: Voishvillo, Alexander

AES Convention 115 · Paper 5912 · October 2003

Abstract

The compression driver has always been and remains an essential component of sound reinforcement systems despite its unavoidable nonlinear distortion. This distortion is caused by various effects, including adiabatic compression of air in the front chamber, modulation of the chamber's air stiffness, and modulation of the chamber's viscous losses. Each of these sources of distortion is inherent in the compression driver's operation, each adversely affects the compression driver's performance in its own specific way, and each is characterized by a different nonlinear 'signature.' Comparative analysis of these distortion sources is undertaken. Nonlinear and parametric effects are explicitly expressed. The influence of diaphragm displacement, compression ratio, and chamber sound pressure on the generation of intermodulation and harmonic distortion is explored. Some design recommendations are given.

Details

Published in
AES Convention 115
AES Convention
115
Paper number
5912
Publication date
October 6, 2003
Session subject
Loudspeakers
Affiliation
Cerwinski Labs, Simi Valley, CA (See document for exact affiliation information.)
Type
Convention Paper