A convolution model for computing the far-field directivity of a parametric loudspeaker array

Chuang Shi; Yoshinobu Kajikawa

doi:10.1121/1.4906163

A convolution model for computing the far-field directivity of a parametric loudspeaker array

J Acoust Soc Am. 2015 Feb;137(2):777-84. doi: 10.1121/1.4906163.

Authors

Chuang Shi¹, Yoshinobu Kajikawa¹

Affiliation

¹ Department of Electrical and Electronic Engineering, Kansai University, 3-3-35 Yamatecho, Suita, Osaka Prefecture, 564-8680, Japan.

PMID: 25698012
DOI: 10.1121/1.4906163

Abstract

This paper describes a method to compute the far-field directivity of a parametric loudspeaker array (PLA), whereby the steerable parametric loudspeaker can be implemented when phased array techniques are applied. The convolution of the product directivity and the Westervelt's directivity is suggested, substituting for the past practice of using the product directivity only. Computed directivity of a PLA using the proposed convolution model achieves significant improvement in agreement to measured directivity at a negligible computational cost.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Acoustics / instrumentation*
Amplifiers, Electronic*
Computer Simulation*
Equipment Design
Models, Theoretical*
Motion
Pressure
Sound*
Time Factors
Transducers, Pressure*