The University of Southampton
University of Southampton Institutional Repository

Hydrophone area-averaging correction factors in nonlinearly generated ultrasonic beams

Cooling, M.P., Humphrey, V.F. and Wilkens, V. (2011) Hydrophone area-averaging correction factors in nonlinearly generated ultrasonic beams Journal of Physics: Conference Series, 279, (1), p. 12002. (doi:10.1088/1742-6596/279/1/012002).

Record type: Article

Abstract

The nonlinear propagation of an ultrasonic wave can be used to produce a wavefield
rich in higher frequency components that is ideally suited to the calibration, or intercalibration,
of hydrophones. These techniques usually use a tone-burst signal, limiting the
measurements to harmonics of the fundamental calibration frequency. Alternatively, using a
short pulse enables calibration at a continuous spectrum of frequencies. Such a technique is
used at PTB in conjunction with an optical measurement technique to calibrate devices.
Experimental findings indicate that the area-averaging correction factor for a hydrophone in
such a field demonstrates a complex behaviour, most notably varying periodically between
frequencies that are harmonics of the centre frequency of the original pulse and frequencies
that lie midway between these harmonics. The beam characteristics of such nonlinearly
generated fields have been investigated using a finite difference solution to the nonlinear
Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation for a focused field. The simulation results
are used to calculate the hydrophone area-averaging correction factors for 0.2 mm and 0.5 mm
devices. The results clearly demonstrate a number of significant features observed in the
experimental investigations, including the variation with frequency, drive level and
hydrophone element size. An explanation for these effects is also proposed.

Full text not available from this repository.

More information

Published date: 2011

Identifiers

Local EPrints ID: 188435
URI: http://eprints.soton.ac.uk/id/eprint/188435
ISSN: 1742-6588
PURE UUID: 00f623c5-a9a7-4fcb-a355-79e142e8224b
ORCID for V.F. Humphrey: ORCID iD orcid.org/0000-0002-3580-5373

Catalogue record

Date deposited: 25 May 2011 09:58
Last modified: 18 Jul 2017 11:42

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×