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Recent progress at NPL in the use of optical techniques for hydrophone calibration.

Theobald, P D; Bickley, C J; Robinson, S P (2003) Recent progress at NPL in the use of optical techniques for hydrophone calibration. In: Proceedings of the Institute of Acoustics meeting on Underwater Acoustic Measurement and Testing., 9-10 January 2003, NPL, UK.

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Abstract

Optical methods have been used at NPL to realise the primary standard for calibrating hydrophones at frequencies greater than 500 kHz since the mid 1980’s. The methods have the potential for high accuracy and enable the direct measurement of an acoustic field parameter such as acoustic particle displacement, or acoustic particle velocity. This paper describes some of the recent progress that has been made at NPL with improving the existing primary standard at megahertz frequencies. Also described are the first steps toward developing new primary standards at kilohertz frequencies based on optical methods.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: Acoustics
Acoustics > Underwater Acoustics
Last Modified: 02 Feb 2018 13:17
URI: http://eprintspublications.npl.co.uk/id/eprint/3601

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