Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/84908
Title: An alternative method to measure the on-axis difference-frequency sound in a parametric loudspeaker without using an acoustic filter
Authors: Gan, Woon-Seng
Ji, Peifeng.
Liu, Wei.
Wu, Shuaibing.
Yang, Jun.
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2012
Source: Ji, P., Liu, W., Wu, S., Yang, J.,& Gan, W. S. (2012). An alternative method to measure the on-axis difference-frequency sound in a parametric loudspeaker without using an acoustic filter. Applied Acoustics, 73(12), 1244-1250.
Series/Report no.: Applied acoustics
Abstract: The self-demodulation characteristic of finite-amplitude ultrasonic sound waves can be applied with parametric loudspeaker to reproduce audible sound with highly directivity. But measuring the difference-frequency sound is still a problem due to the spurious sound generated as a result of nonlinearity caused by the product of the primary waves at the receiving system. In this paper, based on the phase-cancellation method and the Gaussian beam expansion technique, an alternative method is proposed to measure the on-axis difference-frequency sound accurately without using any traditional acoustic filter, where the spurious sound can be greatly reduced or even eliminated. The proposed method is more suitable for the case where the piston source in the parametric loudspeaker comprises multiple small piezoelectric transducers (PZTs) and each transducer element in the array may have different frequency response. The validity of the proposed method is confirmed both by simulations and experiments.
URI: https://hdl.handle.net/10356/84908
http://hdl.handle.net/10220/12609
ISSN: 0003-682X
DOI: 10.1016/j.apacoust.2012.04.010
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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