Megalith
24-bit/48kHz
- Joined
- Aug 20, 2006
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- 13,000
Does this mean that well get earplugs that can truly block out all sound? I could really use a pair to block out my annoying neighbors.
In a paper published in the Applied Physics Letters this week, the Hong Kong researchers describe a rather more active absorption system (but not totally active) composed of two resonators, both of which are tuned to the same frequency, which is itself "impedance-matched" to the background medium, e.g. the open air or whatever surrounding the acoustic absorber. The result is sound-killing destructive interference.
In a paper published in the Applied Physics Letters this week, the Hong Kong researchers describe a rather more active absorption system (but not totally active) composed of two resonators, both of which are tuned to the same frequency, which is itself "impedance-matched" to the background medium, e.g. the open air or whatever surrounding the acoustic absorber. The result is sound-killing destructive interference.