Investigation on the Sound Absorption Properties of MPA/MR
This paper introduces a sound absorption structure named as MPA/MR which is a combination of the MPA and Metal Rubber (MR) material. On the basis of Rayleigh model and sound propagation theory in pipe, according to the acoustoelectric analogy method, the theoretical acoustic model of MPA/MR is established, and the formula of absorption coefficient is derived. The multi-function standing wave tube with two microphones was used to obtain acoustic characteristics of MPA/MR experimentally, and the effects of the parameters were analyzed as well. The investigation indicates that MPA/MR can be applied with a broad range of application prospects.
Yansheng Yin and Xin Wang
Y. H. Ma et al., "Investigation on the Sound Absorption Properties of MPA/MR", Advanced Materials Research, Vols. 79-82, pp. 2147-2150, 2009