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Journal Article

Dynamic Measurement of Transducer Effective Radiation Area

Authors: Klippel, Wolfgang; Schlechter, Joachim

Journal of the Audio Engineering Society · Volume 59 · Issue 1/2 · pp. 44–52 · January 2011

Abstract

Accurate measurement of the effective radiation area of loudspeakers is important because this parameter determines the acoustical power and the efficiency. The conventional methods fail for microspeakers and headphones when the surround geometry is complex and the excursions do not vary linearly. Two new methods are proposed to handle these cases: using laser sensor and microphone to measure voice-coil displacement and sound pressure, and using laser triangulation scanner to measure vibration and geometry of the radiator.

Details

Publication
Journal of the Audio Engineering Society
Volume
59
Issue
1/2
Pages
44–52
Publication date
January 6, 2011
Affiliation
Klippel GmbH, Dresden, Germany (See document for exact affiliation information.)
Type
Journal Article