The Importance of Ear-Like Couplers in the Design of an Objective Test Facility for the Measurement of Earmuff Insertion Loss.
ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (UNITED KINGDOM)
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The work described in this report was performed as part of a programme of research aimed at the development of an objective method of earmuff attenuation measurement. Data are presented which show that, for insertion loss measurements, the attenuation spectra produced by an objective method are practically independent of the method of acoustically coupling the measuring microphone to the volume contained by the earmuff. This simplifies the design of the objective method.
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