Diffusive hydrophone for ultrasonic measurements

Citation
H. Ohta et al., Diffusive hydrophone for ultrasonic measurements, JPN J A P 1, 40(5B), 2001, pp. 3570-3571
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Volume
40
Issue
5B
Year of publication
2001
Pages
3570 - 3571
Database
ISI
SICI code
0021-4922(200105)40:5B<3570:DHFUM>2.0.ZU;2-C
Abstract
Experimental performance of a newly developed diffusive hydrophone (DHP) is evaluated with respect to its sensitivity and spatial resolution. Although conventional hydrophones such as a polyvinylidene fluoride (PVDF) needle t ype hydrophone have been widely used in measurements of sound pressure, the y have often failed to show sufficient sensitivity when their active elemen ts are as small as 0.2 mm in diameter or below. The DHP allows precise use in sound field measurements with sufficient sensitivity. The basic operatio n of the DHP is discussed below, taking into account the spatial averaging effect that inevitably occurs over the hydrophone aperture.