A sound absorber made of copper to reduce virus spread in architectural applications
For many years, copper and copper alloys materials have been recognized as an efficient antimicrobial. Experimental studies have reported that solid copper surfaces can kill 99.9% of microorganisms within two hours of contact, mainly attributed to the release of ions. However, copper materials in ac...
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| Published in: | The Journal of the Acoustical Society of America 2021-10, Vol.150 (4), p.A248-A249 |
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| Main Author: | |
| Format: | Article |
| Language: | eng |
| Online Access: | Get full text |
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| Summary: | For many years, copper and copper alloys materials have been recognized as an efficient antimicrobial. Experimental studies have reported that solid copper surfaces can kill 99.9% of microorganisms within two hours of contact, mainly attributed to the release of ions. However, copper materials in acoustical applications have not been usual, mainly because of their costs. The COVID-19 outbreak has boosted the use of copper in the most frequently touched surfaces to help reduce the spread of the virus. In addition to being malleable, ductile, and an extremely good conductor of electricity, copper exhibits other interesting material properties. The characteristic impedance of copper is 80% of the characteristic impedance of stainless steel and it is slightly twice the characteristic impedance of aluminum. Meanwhile, the critical frequency by unit thickness (Hz-m) of a copper panel is about 50% greater than that of an aluminum or steel plate. In this communication, a sound-absorbing device completely made of copper is presented, which makes use of a copper perforated panel and a copper fibrous infill material. The device would be useful to provide sound absorption in those environments where the protection of people's health is important. |
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| ISSN: | 0001-4966 1520-8524 |