The University of Southampton
University of Southampton Institutional Repository

The effects of focused transducer geometry and sample size on the measurement of ultrasonic transmission properties

The effects of focused transducer geometry and sample size on the measurement of ultrasonic transmission properties
The effects of focused transducer geometry and sample size on the measurement of ultrasonic transmission properties
The response of two coaxially aligned weakly focused ultrasonic transducers, typical of those employed for measuring the attenuation of small samples using the immersion method, has been investigated. The effects of the sample size on transmission measurements have been analyzed by integrating the sound pressure distribution functions of the radiator and receiver over different limits to determine the size of the region that contributes to the system response. The results enable the errors introduced into measurements of attenuation to be estimated as a function of sample size. A theoretical expression has been used to examine how the transducer separation affects the receiver output. The calculations are compared with an experimental study of the axial response of three unpaired transducers in water. The separation of each transducer pair giving the maximum response was determined, and compared with the field characteristics of the individual transducers. The optimum transducer separation, for accurate estimation of sample properties, was found to fall between the sum of the focal distances and the sum of the geometric focal lengths as this reduced diffraction errors.
1742-6588
12024
Atkins, T.J.
da84ab27-8dce-4acd-8513-9c3ef7d1b0c0
Humphrey, V.F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
Duck, F.A.
a1178433-533c-4547-8710-3413f044a119
Tooley, M.A.
02cf5f59-029d-4c14-96a0-5aa57d6273d5
Atkins, T.J.
da84ab27-8dce-4acd-8513-9c3ef7d1b0c0
Humphrey, V.F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
Duck, F.A.
a1178433-533c-4547-8710-3413f044a119
Tooley, M.A.
02cf5f59-029d-4c14-96a0-5aa57d6273d5

Atkins, T.J., Humphrey, V.F., Duck, F.A. and Tooley, M.A. (2011) The effects of focused transducer geometry and sample size on the measurement of ultrasonic transmission properties. Journal of Physics: Conference Series, 279 (1), 12024. (doi:10.1088/1742-6596/279/1/012024).

Record type: Article

Abstract

The response of two coaxially aligned weakly focused ultrasonic transducers, typical of those employed for measuring the attenuation of small samples using the immersion method, has been investigated. The effects of the sample size on transmission measurements have been analyzed by integrating the sound pressure distribution functions of the radiator and receiver over different limits to determine the size of the region that contributes to the system response. The results enable the errors introduced into measurements of attenuation to be estimated as a function of sample size. A theoretical expression has been used to examine how the transducer separation affects the receiver output. The calculations are compared with an experimental study of the axial response of three unpaired transducers in water. The separation of each transducer pair giving the maximum response was determined, and compared with the field characteristics of the individual transducers. The optimum transducer separation, for accurate estimation of sample properties, was found to fall between the sum of the focal distances and the sum of the geometric focal lengths as this reduced diffraction errors.

This record has no associated files available for download.

More information

Published date: 2011

Identifiers

Local EPrints ID: 189299
URI: http://eprints.soton.ac.uk/id/eprint/189299
ISSN: 1742-6588
PURE UUID: 30f62a46-fd5a-4b37-979b-c055293864e4
ORCID for V.F. Humphrey: ORCID iD orcid.org/0000-0002-3580-5373

Catalogue record

Date deposited: 01 Jun 2011 15:24
Last modified: 15 Mar 2024 03:17

Export record

Altmetrics

Contributors

Author: T.J. Atkins
Author: V.F. Humphrey ORCID iD
Author: F.A. Duck
Author: M.A. Tooley

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.

×