音の隔離と巨大な線形非互換性は,コンパクトな音響循環器に存在します
Romain Fleury1, Dimitrios L Sounas, Caleb F Sieck
1Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX 78712, USA.
Science (New York, N.Y.)
|February 1, 2014
まとめ
研究者らは,流体バイアスメタ原子を用いたコンパクトな音響装置を開発し,音の隔離と非相互伝送を達成した. この磁気のない循環器は,聴覚可能な周波数で有意な音響的非互換性を提供します.
科学分野:
- アコースティクス アコースティクス
- メタマテリアルとは
- 波の物理学の波形物理学
背景:
- 音響隔離と非互換的な音声伝送は極めて重要ですが,高出力や大きな音量なしで達成することは困難です.
- 既存の方法は,しばしば非線形または磁音効果に依存し,実用的な応用を制限しています.
- 非相互の電磁伝播は磁気バイアスを用いるが,音響類はあまり発達していない.
研究 の 目的:
- 非互換的な音声伝送のための新しい,コンパクトな音響装置を導入する.
- メタ原子における流体力学を用いた磁気バイアスの音響アナログを実証する.
- 亜波長構造で高い音響非互換性を達成するために.
主な方法:
- 振動するリングの穴を備えたサブ波長メタ原子を設計した.
- 循環する液体を導入し,空洞内の角運動量バイアスを生み出しました.
- 流体バイアスによるアジムタル共鳴モードの分割を分析した.
- 空中の音波のための線形,磁気のない循環器を設計した.
主要な成果:
- コンパクトなメタ原子装置で巨大な音響的非互換性を実証した.
- 空中の音波に対して,最大40デシベルまでの非相互隔離が観察されました.
- 聴覚周波数で非相互伝送を達成しました.
- この装置は,磁気バイアスや高出力の要求なしに動作します.
結論:
- 提案された流体バイアスメタアトムは,音波の磁気バイアスを効果的に模倣する.
- このアプローチにより,コンパクトで磁気のない音響循環器が実現し,有意な非相互隔離が可能になります.
- この発見は,実際の音響装置における音の伝播を制御するための新しい道を開く.
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