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Most of compression drivers have phasing plugs with annular slots. Existing theories give recommendations for positioning of annular slots to suppress air resonances in compression chamber. However, interaction of diaphragm’s mechanical resonances with the compression chamber’s air resonances makes the problem very complex and a general theoretical solution hardly exists. New approach, based on certain empirical assumptions, is proposed and explained. New phasing plugs have slots of a “meandering” shape that provide effective “averaging” of high-frequency acoustical signal received from different parts of compression chamber. The method is applicable to drivers having domes, cones, and annular diaphragms. Other aspects of the design such as efficiency, compression ratio, and difference between air resonances in dome and annular compression chambers are discussed.
Author (s): Voishvillo, Alexander
Affiliation:
JBL/Harman Professional Solutions, Northridge, CA, USA
(See document for exact affiliation information.)
AES Convention: 141
Paper Number:9618
Publication Date:
2016-09-06
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Session subject:
Transducers
Permalink: https://aes2.org/publications/elibrary-page/?id=18422
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Voishvillo, Alexander; 2016; Compression Drivers’ Phasing Plugs [PDF]; JBL/Harman Professional Solutions, Northridge, CA, USA; Paper 9618; Available from: https://aes2.org/publications/elibrary-page/?id=18422
Voishvillo, Alexander; Compression Drivers’ Phasing Plugs [PDF]; JBL/Harman Professional Solutions, Northridge, CA, USA; Paper 9618; 2016 Available: https://aes2.org/publications/elibrary-page/?id=18422