In this paper we address a series of so-called local plane wave methods (LPW) to measure acoustic absorption. As opposed to other methods, these methods do not rely on assumptions of the global sound field, like e.g. a plane wave or diffuse field, but are based on a local plane wave assumption. Therefore, the LPW methods can be used for any given surface/absorbing material and any arbitrary sound field. The absorption coefficient can be calculated based on a measurement of the acoustic pressure in a number of points in the vicinity of the absorbing surface. The local plane wave methods are illustrated by some numerical and experimental examples.
|Title of host publication||Proceedings of the 21st International Congress on Sound and Vibration, ICSV 21|
|Place of Publication||Beijing, China|
|Publisher||International Institute of Acoustics and Vibration (IIAV)|
|Publication status||Published - 13 Jul 2015|
|Event||21st International Congress on Sound and Vibration, ICSV 2014 - Beijing, China|
Duration: 13 Jul 2014 → 17 Jul 2014
Conference number: 21
|Conference||21st International Congress on Sound and Vibration, ICSV 2014|
|Period||13/07/14 → 17/07/14|
Wijnant, Y. H. (2015). On the local plane wave methods for in situ measurement of acoustic absorption. In Proceedings of the 21st International Congress on Sound and Vibration, ICSV 21 (pp. -). Beijing, China: International Institute of Acoustics and Vibration (IIAV).