INTERACTION OF SOUND GENERATED BY A HIGH-FREQUENCY PARAMETRIC ARRAY WITH EXTERNALLY GENERATED LOWFREQUENCY SOUND

E. Uzhansky, M. Friedlender, I. Bucher

Research output: Contribution to journalConference articlepeer-review

Abstract

As a sound transmitting device based on the nonlinear acoustic theory, parametric acoustic array (PAA) can generate low-frequency spatially focused sound beams in wide frequency band using small aperture transducers. Because of this feature, for more than half a century, PAAs have been raising interest in their study and application in various fields both in the air and underwater. In this research, an interaction of the sound field generated by the PAA with a low-frequency external sound source is studied numerically and experimentally. The experimental setup consisted of a hexagonal array of 48 ultrasonic transducers, a low-frequency speaker, and a single channel microphone. Both simple amplitude-modulated tone signals and signals of a more complex form and modulation were used. The real-time modulation was done through a fast digital processor. The simulations were done via k-Wave acoustic toolbox considering nonlinearities and power law absorption. The results of experiments and simulations are discussed.

Original languageEnglish
Pages (from-to)437-442
Number of pages6
JournalUnderwater Acoustic Conference and Exhibition Series
StatePublished - 2023
Event7th Underwater Acoustics Conference and Exhibition, UACE 2023 - Kalamata, Greece
Duration: 25 Jun 202330 Jun 2023

Keywords

  • active noise control
  • interference
  • nonlinear acoustics
  • parametric acoustic array

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Oceanography
  • Environmental Engineering
  • Acoustics and Ultrasonics

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