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The feasibility of using calibration methods recently developed for working standard microphones in the calibration of audiometric reference couplers and artificial ears.

Barham, R G (1999) The feasibility of using calibration methods recently developed for working standard microphones in the calibration of audiometric reference couplers and artificial ears. NPL Report. CMAM 35

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Abstract

The use of an active coupler in the calibration of working standard (WS2) microphones at NPL has greatly increased the efficiency of the measurement procedure for those devices. This report considers whether the method can be adapted for use in the calibration of artificial ears used in audiometry, since they contain a WS2 microphone. For this type of calibration to yield worthwhile benefits it is also necessary to have a similar method of calibrating reference couplers containing an LSI microphone. The Briiel and Kjrer active coupler type WA 0817 cannot be used with this device, but an alternative calibration method is considered. The report concludes that while these methods are technically feasible, the commercially available hardware is not yet suitable to implement them practically.

Item Type: Report/Guide (NPL Report)
NPL Report No.: CMAM 35
Subjects: Acoustics
Acoustics > Sound in Air
Last Modified: 02 Feb 2018 13:18
URI: http://eprintspublications.npl.co.uk/id/eprint/1136

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