Picture of smart phone in human hand

World leading smartphone and mobile technology research at Strathclyde...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by Strathclyde researchers from the Department of Computer & Information Sciences involved in researching exciting new applications for mobile and smartphone technology. But the transformative application of mobile technologies is also the focus of research within disciplines as diverse as Electronic & Electrical Engineering, Marketing, Human Resource Management and Biomedical Enginering, among others.

Explore Strathclyde's Open Access research on smartphone technology now...

Airborne broad-beam emitter from a capacitive transducer and a cylindrical structure

Guarato, F. and Barduchi de Lima, G. and Windmill, J.F.C. and Gachagan, A. (2016) Airborne broad-beam emitter from a capacitive transducer and a cylindrical structure. In: 2016 IEEE International Ultrasonics Symposium (IUS). IEEE, Piscataway. ISBN 9781467398985

[img]
Preview
Text (Guarato-etal-IUS-2016-Airborne-broad-beam-emitter-from-a-capacitive-transducer)
Guarato_etal_IUS_2016_Airborne_broad_beam_emitter_from_a_capacitive_transducer.pdf - Accepted Author Manuscript

Download (248kB) | Preview

Abstract

Beamwidth broadening of an ultrasonic air-coupled transducer is performed by an emitter constituted of an electrostatic transducer and of a cylinder with an opening at the top covering the surface of the transducer. The acoustic emission is thus forced through a hole smaller than the diameter of the transducer’s surface. In particular, a cylinder with an upper diameter of 10mm and a height of 5mm ensures the beam pattern of the final emitter is broad across a wide frequency range. Sound attenuation is reduced and lobes in the transducer’s beam pattern are cancelled. Beam broadening can improve range estimation techniques and ultrasonic sonar as a wider area can be inspected with one emission with no need for scanning.