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Fundamental standards for acoustics based on optical methods - phase two report for sound in water.

Theobald, P; Robinson, S P; Thompson, A D; Preston, R C; Lepper, P*; Swift, C*; Yuebing, W*; Tyrer, J*; Hargrave, S* (2003) Fundamental standards for acoustics based on optical methods - phase two report for sound in water. NPL Report. CAIR 3

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Abstract

This report documents the progress of work towards the development of fundamental standards for acoustics based on optical methods for sound in water between 1 kHz and 500 kHz. The favoured approach for achieving this is particle velocity measurement using heterodyne interferometry and a reflecting membrane in the acoustic field. The report focuses on the development of a new optical configuration based on an all-fibre interferometer system and presents some initial result obtained using an early prototype of this system.
A review of current progress on the project is also presented with recommendations made for the direction of work to be undertaken in the third phase of the project. This report is the Deliverable for the Phase Two Work Package for Project 3.6 of the NMS Quantum Metrology Programme for the UK Department of Trade and Industry. The sound in water aspect of the project is being undertaken by a consortium of the National Physical Laboratory and Loughborough University, with Laser Optical Engineering Ltd. as a sub-contractor.

Item Type: Report/Guide (NPL Report)
NPL Report No.: CAIR 3
Keywords: vibrometer, heterodyn interferometer
Subjects: Quantum Phenomena
Last Modified: 02 Feb 2018 13:16
URI: http://eprintspublications.npl.co.uk/id/eprint/2659

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