Volterra model of the parametric array loudspeaker operating at ultrasonic frequencies
Volterra model of the parametric array loudspeaker operating at ultrasonic frequencies
The parametric array loudspeaker (PAL) is an application of the parametric acoustic array in air, which can be applied to transmit a narrow audio beam from an ultrasonic emitter. However, nonlinear distortion is very perceptible in the audio beam. Modulation methods to reduce the nonlinear distortion are available for on-axis far-field applications. For other applications, preprocessing techniques are wanting. In order to develop a preprocessing technique with general applicability to a wide range of operating conditions, the Volterra filter is investigated as a nonlinear model of the PAL in this paper. Limitations of the standard audio-to-audio Volterra filter are elaborated. An improved ultrasound-to-ultrasound Volterra filter is proposed and empirically demonstrated to be a more generic Volterra model of the PAL.
Shi, Chuang
c46f72bd-54c7-45ee-ac5d-285691fccf81
Kajikawa, Yoshinobu
a7d32c43-f780-4ae0-884c-08fe6f70c582
Shi, Chuang
c46f72bd-54c7-45ee-ac5d-285691fccf81
Kajikawa, Yoshinobu
a7d32c43-f780-4ae0-884c-08fe6f70c582
Shi, Chuang and Kajikawa, Yoshinobu
(2016)
Volterra model of the parametric array loudspeaker operating at ultrasonic frequencies.
Journal of the Acoustical Society of America, 140 (5).
(doi:10.1121/1.4966962).
Abstract
The parametric array loudspeaker (PAL) is an application of the parametric acoustic array in air, which can be applied to transmit a narrow audio beam from an ultrasonic emitter. However, nonlinear distortion is very perceptible in the audio beam. Modulation methods to reduce the nonlinear distortion are available for on-axis far-field applications. For other applications, preprocessing techniques are wanting. In order to develop a preprocessing technique with general applicability to a wide range of operating conditions, the Volterra filter is investigated as a nonlinear model of the PAL in this paper. Limitations of the standard audio-to-audio Volterra filter are elaborated. An improved ultrasound-to-ultrasound Volterra filter is proposed and empirically demonstrated to be a more generic Volterra model of the PAL.
Text
JASA16_Accepted
- Accepted Manuscript
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Accepted/In Press date: 21 October 2016
e-pub ahead of print date: 11 November 2016
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Local EPrints ID: 483683
URI: http://eprints.soton.ac.uk/id/eprint/483683
ISSN: 0001-4966
PURE UUID: aa020944-4063-44f9-93d4-4f34fff85807
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Date deposited: 03 Nov 2023 17:53
Last modified: 18 Mar 2024 04:13
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Author:
Chuang Shi
Author:
Yoshinobu Kajikawa
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