An alternative method to measure the on-axis difference-frequency sound in a parametric loudspeaker without using an acoustic filter
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 nonlineari...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/84908 http://hdl.handle.net/10220/12609 |
| _version_ | 1826114100729479168 |
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| author | Gan, Woon-Seng Ji, Peifeng. Liu, Wei. Wu, Shuaibing. Yang, Jun. |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Gan, Woon-Seng Ji, Peifeng. Liu, Wei. Wu, Shuaibing. Yang, Jun. |
| author_sort | Gan, Woon-Seng |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T03:33:59Z |
| format | Journal Article |
| id | ntu-10356/84908 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:33:59Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/849082020-03-07T13:56:09Z An alternative method to measure the on-axis difference-frequency sound in a parametric loudspeaker without using an acoustic filter Gan, Woon-Seng Ji, Peifeng. Liu, Wei. Wu, Shuaibing. Yang, Jun. School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering 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. 2013-07-31T06:11:11Z 2019-12-06T15:53:27Z 2013-07-31T06:11:11Z 2019-12-06T15:53:27Z 2012 2012 Journal Article 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. 0003-682X https://hdl.handle.net/10356/84908 http://hdl.handle.net/10220/12609 10.1016/j.apacoust.2012.04.010 en Applied acoustics |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering Gan, Woon-Seng Ji, Peifeng. Liu, Wei. Wu, Shuaibing. Yang, Jun. An alternative method to measure the on-axis difference-frequency sound in a parametric loudspeaker without using an acoustic filter |
| title | An alternative method to measure the on-axis difference-frequency sound in a parametric loudspeaker without using an acoustic filter |
| title_full | An alternative method to measure the on-axis difference-frequency sound in a parametric loudspeaker without using an acoustic filter |
| title_fullStr | An alternative method to measure the on-axis difference-frequency sound in a parametric loudspeaker without using an acoustic filter |
| title_full_unstemmed | An alternative method to measure the on-axis difference-frequency sound in a parametric loudspeaker without using an acoustic filter |
| title_short | An alternative method to measure the on-axis difference-frequency sound in a parametric loudspeaker without using an acoustic filter |
| title_sort | alternative method to measure the on axis difference frequency sound in a parametric loudspeaker without using an acoustic filter |
| topic | DRNTU::Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/84908 http://hdl.handle.net/10220/12609 |
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