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Convention Paper

Dual Diaphragm Compression Drivers

Authors: Voishvillo, Alex

AES Convention 131 · Paper 8502 · October 2011

Abstract

A new type of compression driver consists of two motors, two diaphragm assemblies, and two phasing plugs connected to the same acoustical load (horn or waveguide). The annular flexural diaphragms are made of light and strong polymer film providing low moving mass. Unique configuration of the phasing plugs provides summation of both acoustical signals and direction of the resulting signal into a mutual acoustical load.

Principles of operation of the dual driver are explained using a combination of matrix analysis, finite elements analysis, and data obtained from a scanning vibrometer. Comparison of performance of this driver and conventional driver based on titanium dome diaphragm is performed. New transducer provides increase of power handling, lower thermal compression, smoother frequency response, and decrease of nonlinear distortion and sub-harmonics.

Details

Published in
AES Convention 131
AES Convention
131
Paper number
8502
Publication date
October 6, 2011
Session subject
Transducers and Audio Equipment
Affiliation
JBL Professional, Northridge, CA, USA (See document for exact affiliation information.)
Type
Convention Paper