An international key comparison of free-field hydrophone calibrations in the frequency range 1 to 500kHz

• DOI: 10.1121/1.2228790
• Publication Date: 2006-09-11T19:04:37Z
• Authors: Stephen P. Robinson; Peter M. Harris; Justin Ablitt; Gary Hayman; Alex Thompson; A. Lee van Buren; Joseph F. Zalesak; Robert M. Drake; Alexander E. Isaev; Alexander M. Enyakov; Christopher Purcell; Zhu Houqing; Wang Yuebing; Zhang Yue; Pierre Botha; Dieter Krüger
• Keywords: Hydrophone; Free field

A description is given of the results a Key Comparison primary free-field standards for underwater acoustics at frequencies from 1 to 500kHz. This first such exercise in field acoustic calibration and measurement. Laboratories UK, Germany, USA, Russia, China, Canada, South Africa participated by calibrating three reference hydrophones, with project coordination provided National Physical Laboratory, UK. The agreement between obtained comparison was generally encouraging, values reported laboratories agreeing within quoted uncertainties over majority frequency range, lying ±0.5-dB band up 300kHz. discussion general sources calibrations, particular those which are thought have contributed differences laboratories. participants been used estimate equivalence national measurement this field.