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Convention Paper

Identification Compression Driver Parameters Based on a Concept of Diaphragm’s Frequency-Dependent Area

Authors: Voishvillo, Alexander

AES Convention 137 · Paper 9164 · October 2014

Abstract

In the previous work, matrix analysis was applied the derivation of the transfer matrix of a compression driver’s diaphragm. Its mechanical impedance consisted of lumped parameters and a part corresponding to the high-frequency breakups. In the current work the mechanical impedance is based on lumped parameters whereas the area of the diaphragm is presented as a function of frequency. The transfer function of compression driver is derived from the overall matrix that includes the frequency-dependent area of the diaphragm. The area is included in the transformation matrix that links the mechanical and acoustical parts. By equating the measured SPL for a given input voltage to SPL derived from the model, the expression for the frequency-dependent area of the diaphragm can be derived. This information is used in modeling and design of different drivers using the identified diaphragm.

Details

Published in
AES Convention 137
AES Convention
137
Paper number
9164
Publication date
October 6, 2014
Session subject
Transducers
Affiliation
JBL/Harman Professional, Northridge, CA, USA (See document for exact affiliation information.)
Type
Convention Paper