Study on the Acoustic Characteristics of Different Cavity Thickness and the Structure of Different Absorption Materials

DOI

10.2991/tmcm-15.2015.18How to use a DOI?

Keywords

composite structure; absorption coefficient; resonance frequency; sound-absorbing material

Abstract

In the reverberation room, the absorption coefficient is measured by the composite structure of perforated plate, perforated plate and porous sound absorbing material, and the sound absorption characteristics of perforated plate are studied. Through the analysis of the data ,it is founded that: under different thickness of the cavity D, the peak value of sound absorption coefficient of perforated plate is maintained is about 0.35; the resonance frequencies of the perforated plate decreases continuously along with the increase of the thickness of the cavity D, distributed in 250 ~ 630Hz.Perforated plate with composite structures of different absorption material is under the different thickness of the cavity D, and the peak value of the absorption coefficient is maintained at 0.7~0.85;the resonance frequency of the composite structure decreases with the increase of the cavity thickness D , distributed in 200 ~ 500 Hz. The width of the absorption band has no obvious relation with the thickness of the cavity D, but it has a great relationship with the perforated plate which is added to the sound absorption material.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Qingbin Zhao
AU  - Liu Yan
AU  - Xiaopai Zhang
AU  - Xiaojuan Zhang
AU  - Changbin Zhang
PY  - 2015/11
DA  - 2015/11
TI  - Study on the Acoustic Characteristics of Different Cavity Thickness and the Structure of Different Absorption Materials
BT  - Proceedings of the 2015 International Conference on Test, Measurement and Computational Methods
PB  - Atlantis Press
SP  - 70
EP  - 73
SN  - 2352-538X
UR  - https://doi.org/10.2991/tmcm-15.2015.18
DO  - 10.2991/tmcm-15.2015.18
ID  - Zhao2015/11
ER  -