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Performance limitations of high-power wide-bandwidth conventional and co-entrant compression drivers are briefly reviewed. An idealized co-entrant compression driver is modeled and acoustic performance limitations discussed. The beneficial effect of axisymmetry is illustrated using results from numerical models. Vibrational behavior of spherical-cap, conical, and bi-conical diaphragms are compared. Axiperiodic membrane geometries consisting of circular arrays of features are discussed. This discussion leads to the conclusion that, for a given feature size, annular axiperiodic diaphragms have vibrational properties mostly dependent on the width of the annulus rather than it`s diameter. Numerically modeled and measured acoustic performance of a high-power wide-bandwidth compression driver using an annular axiperiodic membrane, with vibrational and acoustic modes optimized, is discussed.
Author (s): Dodd, Mark
Affiliation:
GP Acoustics, Ipswich, Suffolk, UK
(See document for exact affiliation information.)
AES Convention: 139
Paper Number:9391
Publication Date:
2015-10-06
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Session subject:
Transducers
Permalink: https://aes2.org/publications/elibrary-page/?id=17948
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Dodd, Mark; 2015; Wideband Compression Driver Design. Part 2, Application to a High Power Compression Driver with a Novel Diaphragm Geometry [PDF]; GP Acoustics, Ipswich, Suffolk, UK; Paper 9391; Available from: https://aes2.org/publications/elibrary-page/?id=17948
Dodd, Mark; Wideband Compression Driver Design. Part 2, Application to a High Power Compression Driver with a Novel Diaphragm Geometry [PDF]; GP Acoustics, Ipswich, Suffolk, UK; Paper 9391; 2015 Available: https://aes2.org/publications/elibrary-page/?id=17948