A new nondestructive technique to measure the nonlinear suspension parameters (stiffness Kms and mechanical resistance Rms) of a loudspeaker using an active harmonic control technique is presented. The goal of the active harmonic control is to eliminate the higher harmonics from the displacement signal so that a purely harmonic motion of the diaphragm is ensured. The nonlinear stiffness Kms is then measured as a function of instantaneous and peak displacement; the mechanical resistance Rms is measured as a function of velocity. A frequency dependence of these parameters is also discussed.
Authors:
Novak, Antonin; Lotton, Pierrick; Simon, Laurent
Affiliations:
Orkidia Audio, Bidart, France; Université du Maine, UMR CNRS 6613, Les Mans, France(See document for exact affiliation information.)
AES Convention:
136 (April 2014)
Paper Number:
9054
Publication Date:
April 25, 2014
Subject:
Transducers
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