## ABSTRA CT The acoustic behaviour of fibrous materials which depends upon physical structural parameters has been investigated experimentally. Numerous values of characteristic impedance and propagation constant have been determined for materials having different fibre diameter and density. For
Acoustic absorption properties of materials
โ Scribed by RBW Heng
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 976 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0950-0618
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๐ SIMILAR VOLUMES
## Results are presented of an investigation into the acoustical properties of a range of fibrous absorbent materials. Measured values of characteristic impedance and propagation coefficient are shown to normalise as a function of frequency divided by flow-resistance and can be represented by simple
The techniques frequently used in laboratories to measure the absorption coefficient of materials tend to be quite tedious or too sophisticated for industrial purposes. Indeed, quite often, only comparative control of the acoustical properties of a material, essentially in the low frequency domain (