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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/2099

Title: International key comparison of free-field hydrophone calibrations in the frequency range 1 to 500 kHz
Authors: Robinson, SP
Harris, PM
Ablitt, J
Hayman, G
Thompson, A
Van Buren, AL
Zalesak, JF
Drake, RM
Isaev, AE
Enyakov, AM
Purcell, C
Zhu, HQ
Wang, YB
Zhang, Y
Botha, P
Kruger, D
Keywords: International key comparisons
Primary free-field standards
Underwater acoustics
International trade
Issue Date: Sep-2006
Publisher: Acoustical Society of America: American Institute of Physics
Citation: Robinson, SP, et al. 2006. International key comparison of free-field hydrophone calibrations in the frequency range 1 to 500 kHz. Journal of the Acoustical Society of America, vol. 120(3), pp 1366-1373
Abstract: A description is given of the results of a Key Comparison of primary free-field standards for underwater acoustics at frequencies from 1 to 500 kHz. This is the first such Key Comparison exercise in the field of underwater acoustic calibration and measurement. Laboratories from UK, Germany, USA, Russia, China, Canada, and South Africa participated by calibrating three reference hydrophones, with project coordination provided by the National Physical Laboratory, UK. The agreement between the results obtained from the comparison was generally encouraging, with the calibration values reported by the laboratories agreeing within quoted uncertainties over the majority of the frequency range, and the results generally lying within a 0.5-dB band for frequencies up to 300 kHz. A discussion is given of the general sources of uncertainties in the calibrations, in particular those which are thought to have contributed to the differences in the results between laboratories. The results of the participants have been used to estimate the equivalence of national measurement standards within this field.
URI: http://hdl.handle.net/10204/2099
ISSN: 0001-4966
Appears in Collections:Metrology
General science, engineering & technology

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