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.
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
2011
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), .
(doi:10.1088/1742-6596/279/1/012024).
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
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:
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
