Abstract
Acoustic metamaterials (AM) have emerged as an academic discipline within the last decade. When used for sound insulation, metamaterials can show high transmission loss at low frequencies despite having low mass per unit area. This paper investigates the possibility of using AMs for increasing the sound insulation of finite single leaf walls (SLW), focusing on the coincidence effect problem. Formulas are derived using a variational technique for the forced sound transmission of finite SLW with a coupled array of single degree of freedom resonators. An analytical model is presented for this simple case, and the effects of the band gap in sound transmission and radiation are analysed. Moreover, the influence of each parameter is studied giving way to an optimized way of designing this type of structures using constrained parameter optimization. Different objective functions are compared and discussed. Finally, some conclusions are drawn regarding the effectiveness of the proposed model, possible applications, and future
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Original language | English |
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Title of host publication | Proceedings of internoise 2019 |
Number of pages | 13 |
Publisher | International Institute of Noise Control Engineering |
Publication date | 2019 |
Article number | 2184 |
ISBN (Print) | 978-84-87985-31-7 |
Publication status | Published - 2019 |
Event | 48th International Congress and Exhibition on Noise Control Engineering - Palacio Municipal de Congresos de Madrid, Madrid, Spain Duration: 16 Jun 2019 → 19 Jun 2019 Conference number: 48 https://internoise2019.org/ |
Conference
Conference | 48th International Congress and Exhibition on Noise Control Engineering |
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Number | 48 |
Location | Palacio Municipal de Congresos de Madrid |
Country/Territory | Spain |
City | Madrid |
Period | 16/06/2019 → 19/06/2019 |
Internet address |
Keywords
- Sound-Insulation
- Metamaterial
- Analytical