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Convention Paper

Measurement and Analysis of Subharmonics and Other Distortions in Compression Drivers

Authors: Bolaños, Fernando

AES Convention 118 · Paper 6517 · May 2005

Abstract

The formation, synchronization and lock-in of the subharmonic frequencies, when working with the analytic form of the pressure signal, have been observed. A parametric or autoparametric mechanism seems to be the main cause of these subharmonic excitations and responses. The modal shape of the moving assembly including the coil, the former and the suspension has an important role in the whole dynamic of these transducers.

One of the four analyzed samples presented a bilinear response, because of a spontaneous formation of sidebanding when it was excited in specific spectral regions. Another sample showed a combined behavior which was in between the bilinear character and the locked-in subharmonic. This sample exhibited regions in which the spontaneous sidebanding had a fractal structure.

Details

Published in
AES Convention 118
AES Convention
118
Paper number
6517
Publication date
May 6, 2005
Session subject
Loudspeakers & Microphones
Affiliation
Acústica Beyma S.A. (See document for exact affiliation information.)
Type
Convention Paper