TY - JOUR
T1 - Broadband acoustic metamaterials with electro-magnetically controlled properties
AU - Donskoy, Dimitri
AU - Malinovsky, Vladimir S.
PY - 2013
Y1 - 2013
N2 - The proposed class of acoustic metamaterials utilizes clouds of electrically charged nano or micro particles exposed to an external magnetic field. The particles are also elastically supported or embedded into elastically compliant medium in a way that the designed structure exhibits two resonances: mechanical spring-mass resonance and electro-magnetic cyclotron resonance. It is shown that if the cyclotron frequency is greater than the mechanical resonance frequency, the designed structure could be highly attenuate (40-60 dB) for vibration and sound waves in a very broad frequency range covering low and very low frequencies. The approach opens up wide range of opportunities for design of adaptive acoustic metamaterials by controlling magnetic field and/or electrical charges.
AB - The proposed class of acoustic metamaterials utilizes clouds of electrically charged nano or micro particles exposed to an external magnetic field. The particles are also elastically supported or embedded into elastically compliant medium in a way that the designed structure exhibits two resonances: mechanical spring-mass resonance and electro-magnetic cyclotron resonance. It is shown that if the cyclotron frequency is greater than the mechanical resonance frequency, the designed structure could be highly attenuate (40-60 dB) for vibration and sound waves in a very broad frequency range covering low and very low frequencies. The approach opens up wide range of opportunities for design of adaptive acoustic metamaterials by controlling magnetic field and/or electrical charges.
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U2 - 10.1121/1.4798421
DO - 10.1121/1.4798421
M3 - Conference article
AN - SCOPUS:84878989690
SN - 1939-800X
VL - 19
JO - Proceedings of Meetings on Acoustics
JF - Proceedings of Meetings on Acoustics
M1 - 065046
T2 - 21st International Congress on Acoustics, ICA 2013 - 165th Meeting of the Acoustical Society of America
Y2 - 2 June 2013 through 7 June 2013
ER -