Intercomparison to validate calibration methods for hydrophones in the frequency range 10 kHz - 315 kHz

Project Description

The project is to undertake a European intercomparison of free-field hydrophone calibrations in the frequency range 10-315 kHz.The exercice is to be organise as two round-robin intercomparisons with two separate sets of three hydrophones used (Set A and Set B), and with the NPL the coordinating laboratory calibrating both sets and a third set kept as a control. Each set would contain a Brüel and Kjaer 8104, Brüel and Kjaer 8103 and a Reson TC4034 hydrophone. The participants would be asked to undertake a free-field calibration of the hydrophones at third-octave frequencies in the frequency range 10-315 kHz by a method of their choice.The method employed are expected to be either calibration by three-transducer spherical-wave reciprocity or by comparison with a calibrated reference hydrophone. Two participants are expected to use open-water facilities, but most participants would use laboratory tank facilities.

Project supported by the European Committees. EC contact MAST-CT94-0095 was supported under the Marine science and Technology Programme and adminitered under Standards, Measurement and Testing Programme.

Final report

Project was completed and final report and associated papers published in 1997-1999.

S P Robinson, R C Preston and G J Green. International comparison of free-field hydrophone calibrations in the frequency range 10-315 kHz. Metrologia, vol. 36, p 287-296, 1999.
S P Robinson, R C Preston and G J Green. An intercomparison of hydrophone calibrations within Europe Proceedings of the IOA, vol 20, part 3, page 1-8, 1998.
S P Robinson, R C Preston and G J Green. An intercomparison of hydrophone calibrations within Europe. JASA vol 103, n5, pt 2, page 2755, May 1998.
S P Robinson and Geraint Green. An intercomparison to validate calibration methods for hydrophones in the frequency range 10-315 kHz. NPL Report CIRA(EXT) 020, February 1997.