不同泡沫镍基复层结构在低频区的吸声性能
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| Published in: | 中国有色金属学报：英文版 Vol. 27; no. 9; pp. 1989 - 1995 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2017
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| Subjects: | |
| Online Access: | Get full text |
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| Bibliography: | 43-1239/TG reticular metal foam; reticular nickel foam; composite structure for sound absorption; low frequency sound absorption Commercial3D reticular nickel foam and its composite structure were investigated on the sound absorption at200-2000Hz.The absorption performance of foam plates1?5layers(1-layer thickness:2.3mm;porosity:89%;average pore-diameter:0.57mm)was found to be poor,and could be improved by adding backed cavum or front perforated thin sheet.The absorption coefficient could reach about0.4at1000-1600Hz for the composite structure of5-layer foam with a backed5mm-thick cavum,and even0.68at about1000Hz for that of2-layer foam with the same cavum and a perforated plate closely in front of the foam. |
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| ISSN: | 1003-6326 |