Acoustic Waves Generated by Parametric Array Loudspeakers

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Jiaxin Zhong (University of Technology Sydney, Australia) Xiaojun Qiu (Nanjing University, China)

Acoustic Waves Generated by Parametric Array Loudspeakers

Jiaxin Zhong (University of Technology Sydney, Australia), Xiaojun Qiu (Nanjing University, China)

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English

CRC Press
13 August 2024

Electrical engineering; Radio technology; Acoustic & sound engineering; Audio processing

Parametric array loudspeakers (PALs) are capable of generating highly directional audio beams from nonlinear interactions of intense airborne ultrasound waves. This unique capability holds great potential in audio engineering. This book systematically introduces the physical principles of acoustics waves generated by PALs, along with the commonly used and the state-of-the-art numerical models, such as the Westervelt model, the convolution directivity model, the Gaussian beam expansion method, and the spherical wave expansion method.

The properties of sound fields generated by PALs are analyzed. Also analyzed are various phenomena including the reflection of acoustics waves generated by PALs from a surface, transmission through a thin partition, scattering by a rigid sphere, and propagation in rooms. Furthermore, the steering and focusing of acoustics waves generated by PALs and potential applications of PALs in active sound control are investigated. Finally, the implementation issues of hardware, signal processing techniques, measurement, and safety are discussed.

The book is tailored to meet the needs of researchers in this field, as well as audio practitioners and acoustics engineers.

By: Jiaxin Zhong (University of Technology Sydney Australia), Xiaojun Qiu (Nanjing University, China)
Imprint: CRC Press
Country of Publication: United Kingdom
Dimensions: Height: 234mm, Width: 156mm,
Weight: 870g
ISBN: 9781032408521
ISBN 10: 1032408529
Pages: 384
Publication Date: 13 August 2024
Audience: College/higher education , Professional and scholarly , Primary , Undergraduate
Format: Hardback
Publisher's Status: Active

Jiaxin Zhong is a postdoctoral researcher at University of Technology Sydney, Australia. Xiaojun Qiu is a Professor at Nanjing University, China. He is a Fellow of the Audio Engineering Society and the International Institute of Acoustics and Vibration. He is author of An Introduction to Virtual Sound Barriers, and co-author of Active Control of Noise and Vibration, 2nd edition, also published by CRC Press.