A model for acoustic absorbent materials derived from coconut fiber

Materiales de Construccion

L. Godinho¹  J. Carbajo²  J. Ramis²  J. Alba³  R. del Rey³ 

[1] CICC, University of Coimbra;Universidad de Alicante;Universitat Politècnica de València;

关键词: acoustic impedance;    absorption coefficient;    natural fibers;    empirical models;   

DOI  :  10.3989/mc.2014.00513

来源: DOAJ

【 摘 要 】

In the present paper, a methodology is proposed for obtaining empirical equations describing the sound absorption characteristics of an absorbing material obtained from natural fibers, specifically from coconut. The method, which was previously applied to other materials, requires performing measurements of air-flow resistivity and of acoustic impedance for samples of the material under study. The equations that govern the acoustic behavior of the material are then derived by means of a least-squares fit of the acoustic impedance and of the propagation constant. These results can be useful since they allow the empirically obtained analytical equations to be easily incorporated in prediction and simulation models of acoustic systems for noise control that incorporate the studied materials.

【 授权许可】

Unknown