Tunable acoustic absorber using a micro acoustic hole array

✍ Scribed by Satoshi Konishi; Mitsuhiro Yoda; Susumu Sugiyama; Sadao Akishita

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 696 KB
• Volume: 83
• Category: Article
• ISSN: 8756-663X
• DOI: 10.1002/(sici)1520-6432(200001)83:1<1::aid-ecjb1>3.0.co;2-r

✦ Synopsis

We propose a tunable acoustic absorbing device using a Helmholtz resonator. Timing the resolution frequency of the device to a desired frequency makes it possible to absorb variable sounds. The designed device forms an array of the Helmholtz resonator with a tunable compliance. The experimental results on controlling the resonant frequency of the device will be described. A deep hole array formed by X-ray lithography is fabricated into the front plate of the device in order to absorb low-frequency noise.