| Autor: |
Belov, S. V., Terekhin, A. S., Balantsev, S. K., Vityaz', P. A., Kaptsevich, V. M., Shelyag, V. K. |
| Zdroj: |
Powder Metallurgy and Metal Ceramics; January 1983, Vol. 22 Issue: 1 p20-23, 4p |
| Abstrakt: |
It has been shown by experiment that sound absorption by porous bronze is influenced by the specimen thickness and pore size and also by the size of the gap between the specimen and a rigid bottom. The highest values of coefficient of sound absorption a (0.9–0.95) in a wide sound frequency range were attained with 8- to 10-mm-thick specimens having pores of 100- to 200-µm size. By varying the size of the gap between the specimen and a rigid bottom it is possible to vary the position of the sound absorption coefficient maximum on the frequency scale without affecting its absolute value. There is good agreement between values of specific resistance to blowing through obtained as a result of acoustic and hydraulic tests, and it is therefore possible to predict the acoustic properties of porous metals from data yielded by hydraulic tests and vice versa. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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