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Review of methods for low frequency transducer calibration in reverberant tanks.

Robinson, S P (1999) Review of methods for low frequency transducer calibration in reverberant tanks. NPL Report. CMAM 34

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Abstract

This report forms a deliverable of Project 2.1d(ii)(b) of the 1995-8 NMS Acoustics Programme.
A review is presented of different methods for calibrating underwater electroacoustic transducers in reverberant test tanks. Emphasis is placed on the use of novel techniques in situations where conventional methods breakdown, in particular for the calibration of acoustic projectors.
Techniques covered include the use of spatial and temporal averaging, using various types of noise as a source, modelling and extrapolating from the free-time signal, suppression of the transducer transient behaviour, the use of directional receivers and arrays, using various methods of echo elimination using signal processing, and attempts to model the reverberant acoustic field inside the test tank. For each method, full reference is made to the relevant literature on the subject. Although a full assessment of accuracy has yet to be undertaken on many of the methods, where possible an indication has been given as to the likely sources of error.

Item Type: Report/Guide (NPL Report)
NPL Report No.: CMAM 34
Subjects: Acoustics
Last Modified: 02 Feb 2018 13:18
URI: http://eprintspublications.npl.co.uk/id/eprint/1141

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