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Control of Ultrasonic Acoustic Fields by Multiple Acoustic Waveguides and Piezoelectric Transducers

Authors:
Shigeru Igarashi
Shinichi Takeuchi

Keywords: Acoustic waveguide; Piezoelectric transducer; Ultrasonic acoustic field; Nonlinear calibration; 2D acoustic field simulation.

Abstract:
We propose a system for generating and controlling an ultrasonic acoustic field using multiple acoustic waveguides and piezoelectric transducers. This system can be used as a high-power ultrasonic source for nonlinear calibration of hydrophones. In the system, ultrasonic waves are emitted from multiple transducers with controlled transmission delays, and the acoustic power is increased through acoustic waveguides before being output, this allows synthesis and control of ultrasonic acoustic fields. We simulate the proposed system as a two-dimensional acoustic field in which the computed output sound pressure determines the basic shape of the acoustic waveguide. The proposed system of five transmitting transducers and five acoustic waveguides was compared with a single transmitting transducer, and the results showed a peak sound pressure of 1.5-fold increase value at the same beam width.

Pages: 26 to 31

Copyright: Copyright (c) IARIA, 2014

Publication date: November 16, 2014

Published in: conference

ISSN: 2308-3514

ISBN: 978-1-61208-375-9

Location: Lisbon, Portugal

Dates: from November 16, 2014 to November 20, 2014