Abstract
Membrane-type acoustic metamaterials (MAMs) are lightweight and compact materials with periodic structure. These materials reveal dramatically better sound insulation at low frequencies than the conventional systems of similar dimensions and weight. It promises for the applications of lightweight construction and vehicular cabin to screen sound at a particular frequency band. Existing studies by the authors and other researchers showed that the MAMs with optimized mass distributions could improve the performance of sound insulation. In the present paper, MAMs with eccentric masses are designed and fabricated, and these prototypes are used for experimentally investigating their acoustic performance. Results agree with the numerical results, and they show that the MAMs with optimized eccentric masses' distribution can significantly broaden the frequency range of sound insulation in the low-frequency range.
Original language | English |
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Publication status | Published - 2017 |
Externally published | Yes |
Event | 46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet, INTER-NOISE 2017 - Hong Kong, China Duration: 27 Aug 2017 → 30 Aug 2017 |
Conference
Conference | 46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet, INTER-NOISE 2017 |
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Country/Territory | China |
City | Hong Kong |
Period | 27/08/17 → 30/08/17 |
Keywords
- Building acoustics
- Eccentric masses
- Membrane-type acoustic metamaterials (MAMs)
- Sound insulation
ASJC Scopus subject areas
- Acoustics and Ultrasonics