On grating lobe elimination of difference frequency in parametric loudspeaker
On grating lobe elimination of difference frequency in parametric loudspeaker
The parametric loudspeaker differs from other audio systems in its ability to create highly focused sound beam in air. This focused sound beam can be steered by adjusting a set of delays and weights of the ultrasonic transducer array (UTA), which is a component of parametric loudspeakers. In this paper, we use two ultrasonic primary signals to generate an audible signal at difference frequency. Grating lobes of primary signals occur when the spacing between ultrasonic transducers is larger than half the wavelength of primary signals, but grating lobes of the difference frequency are rarely observed. Therefore, in this paper, we examine this phenomenon and provide an analytical explanation.
257-261
Asia Pacific Signal and Information Processing Association
Shi, Chuang
c46f72bd-54c7-45ee-ac5d-285691fccf81
Gan, Woon-Seng
1936c59c-0552-498c-86a4-20bb81bb561a
15 December 2010
Shi, Chuang
c46f72bd-54c7-45ee-ac5d-285691fccf81
Gan, Woon-Seng
1936c59c-0552-498c-86a4-20bb81bb561a
Shi, Chuang and Gan, Woon-Seng
(2010)
On grating lobe elimination of difference frequency in parametric loudspeaker.
In Proceedings of 2010 APSIPA Annual Summit and Conference, Biopolis, Singapore, December 14-17, 2010.
Asia Pacific Signal and Information Processing Association.
.
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Conference or Workshop Item
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Abstract
The parametric loudspeaker differs from other audio systems in its ability to create highly focused sound beam in air. This focused sound beam can be steered by adjusting a set of delays and weights of the ultrasonic transducer array (UTA), which is a component of parametric loudspeakers. In this paper, we use two ultrasonic primary signals to generate an audible signal at difference frequency. Grating lobes of primary signals occur when the spacing between ultrasonic transducers is larger than half the wavelength of primary signals, but grating lobes of the difference frequency are rarely observed. Therefore, in this paper, we examine this phenomenon and provide an analytical explanation.
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Published date: 15 December 2010
Venue - Dates:
2010 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, Biopolis, Singapore, 2010-02-14 - 2010-12-17
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Local EPrints ID: 484230
URI: http://eprints.soton.ac.uk/id/eprint/484230
PURE UUID: 803a58de-88b3-4dd6-8741-3ff958b6dd77
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Date deposited: 13 Nov 2023 18:42
Last modified: 18 Mar 2024 04:13
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Contributors
Author:
Chuang Shi
Author:
Woon-Seng Gan
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