Abstract
Previous work demonstrated that a multi-objective evolutionary algorithm could be successfully employed as an optimiser to make the design of flat-walled multi-layered anechoic linings more efficient. In the present work, such an algorithm is employed to investigate the practical aspects of the application of multi-layered polyurethane foams as the flat-walled anechoic lining. The investigation includes aspects such as the efficacy of a single layer of material, the minimum number of layers of linings to achieve the minimum overall thickness for low (100Hz), mid (250Hz) and high (500Hz) cut-off frequencies, the use of the three-layered lining composite for low to mid cut-off frequencies and the effect of air gaps.
| Original language | English |
|---|---|
| Journal | Applied Acoustics |
| Volume | 67 |
| Issue number | 5 |
| Pages (from-to) | 476-485 |
| ISSN | 0003-682X |
| Publication status | Published - 2006 |
Keywords
- anechoic chamber
- anechoic lining
- building acoustics