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A European intercomparison of 1 mm hydrophone calibrations in the frequency range 0.5 to 15 MHz has been organised by the BCR of the Commission of the European Communities. Five laboratories in Denmark, the Federal Republic of Germany, Italy, the Netherlands and the UK have calibrated three types of hydrophone using different methods (two-transducer reciprocity, an impulse technique and optical interferometry). The uncertainties quoted at the 95% confidence level ranged from 2.3% to 18%, depending on the frequency, method and laboratory. The results show that it is possible, with care, to obtain agreement between reciprocity and interferometry to within a few per cent. in the range 0.5 to 5 MHz. At 10 and 15 MHz, however, individual results deviate by up to 15% from the grand mean of results. This report presents the results and discusses the conclusions that can be drawn from the intercomparison.

Additional information

Authors: OOSTERBAAN W A, TNO Medical Technology Unit, Leiden (NL);VAN BEEKUM W T, TNO Medical Technology Unit, Leiden (NL);NORTHEVED A, Medicoteknisk Institut, BrÝnby (DK);GIRIBONA P, Centro di Valutazione di Apparecchiature Biomediche, Trieste (IT);LUDWIG G, Physikalisch-Technische Bundesanstalt, Braunschweig (DE)
Bibliographic Reference: EUR 13526 EN (1991) 121 pp., MF, ECU 8
Availability: (2)
Record Number: 199110394 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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