Electrically tunable and broader-band sound absorption by using micro-perforated dielectric elastomer actuator
Most membrane-type acoustic absorbers for low-frequency sound attenuation are applicable only at a fixed resonant frequency for a narrow bandwidth. Tuning of the acoustic absorption spectrum is desired to match the varying noises. This letter presents a micro-perforated dielectric elastomer actuator...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2017
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| Online Access: | https://hdl.handle.net/10356/83352 http://hdl.handle.net/10220/42567 |
| _version_ | 1811681121771978752 |
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| author | Lu, Zhenbo Shrestha, Milan Lau, Gih-Keong |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Lu, Zhenbo Shrestha, Milan Lau, Gih-Keong |
| author_sort | Lu, Zhenbo |
| collection | NTU |
| description | Most membrane-type acoustic absorbers for low-frequency sound attenuation are applicable only at a fixed resonant frequency for a narrow bandwidth. Tuning of the acoustic absorption spectrum is desired to match the varying noises. This letter presents a micro-perforated dielectric elastomer actuator (MPDEA) to make a broader-band acoustic absorber electrically tunable. Voltage activation of the MPDEA reduces the membrane tension and hole size and thus enables the active shifting of the acoustic absorption spectrum. Such a membrane tuning method does not require discrete mechanical parts as for the cavity tuning method. Also presented are the analytical models to predict the voltage-induced hole size change and acoustic characteristics of MPDEA. |
| first_indexed | 2024-10-01T03:35:55Z |
| format | Journal Article |
| id | ntu-10356/83352 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:35:55Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-10356/833522023-03-04T17:12:09Z Electrically tunable and broader-band sound absorption by using micro-perforated dielectric elastomer actuator Lu, Zhenbo Shrestha, Milan Lau, Gih-Keong School of Mechanical and Aerospace Engineering Singapore Centre for 3D Printing Acoustic absorption Elastomeric polymers Most membrane-type acoustic absorbers for low-frequency sound attenuation are applicable only at a fixed resonant frequency for a narrow bandwidth. Tuning of the acoustic absorption spectrum is desired to match the varying noises. This letter presents a micro-perforated dielectric elastomer actuator (MPDEA) to make a broader-band acoustic absorber electrically tunable. Voltage activation of the MPDEA reduces the membrane tension and hole size and thus enables the active shifting of the acoustic absorption spectrum. Such a membrane tuning method does not require discrete mechanical parts as for the cavity tuning method. Also presented are the analytical models to predict the voltage-induced hole size change and acoustic characteristics of MPDEA. Published version 2017-06-02T08:33:18Z 2019-12-06T15:20:35Z 2017-06-02T08:33:18Z 2019-12-06T15:20:35Z 2017 Journal Article Lu, Z., Shrestha, M., & Lau, G.-K. (2017). Electrically tunable and broader-band sound absorption by using micro-perforated dielectric elastomer actuator. Applied Physics Letters, 110(18), 182901-. 0003-6951 https://hdl.handle.net/10356/83352 http://hdl.handle.net/10220/42567 10.1063/1.4982634 en Applied Physics Letters © 2017 American Institute of Physics (AIP). This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics (AIP). The published version is available at: [http://dx.doi.org/10.1063/1.4982634]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 5 p. application/pdf |
| spellingShingle | Acoustic absorption Elastomeric polymers Lu, Zhenbo Shrestha, Milan Lau, Gih-Keong Electrically tunable and broader-band sound absorption by using micro-perforated dielectric elastomer actuator |
| title | Electrically tunable and broader-band sound absorption by using micro-perforated dielectric elastomer actuator |
| title_full | Electrically tunable and broader-band sound absorption by using micro-perforated dielectric elastomer actuator |
| title_fullStr | Electrically tunable and broader-band sound absorption by using micro-perforated dielectric elastomer actuator |
| title_full_unstemmed | Electrically tunable and broader-band sound absorption by using micro-perforated dielectric elastomer actuator |
| title_short | Electrically tunable and broader-band sound absorption by using micro-perforated dielectric elastomer actuator |
| title_sort | electrically tunable and broader band sound absorption by using micro perforated dielectric elastomer actuator |
| topic | Acoustic absorption Elastomeric polymers |
| url | https://hdl.handle.net/10356/83352 http://hdl.handle.net/10220/42567 |
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