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Article Dans Une Revue Physical Review Applied Année : 2020

Acoustic Meta-Equalizer

Yifan Zhu
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Liyun Cao
B. Assouar

Résumé

Acoustic equalization is the process of adjusting the frequency response of a broadband sound signal, which is widely used in communication system and audio acoustics. Here, we introduce the unique concept of acoustic meta-equalizer, viz., a passive acoustic metamaterial-based filter that has tunable frequency response within ultra-broadband (200Hz-20000Hz), and capable to generate a frequency equalization on the input sound signal. By exploiting two kinds of acoustic resonant elements, viz., Helmholtz and Fabry-Perot resonators, we realize and demonstrate ultra-broadband and tunable filters, within an integrated meta-structure. In analogy with the conventional equalizer concept in signal processing, we numerically, analytically, and experimentally demonstrate functional filters, signal reproductions, and sound effect controls by the conceived acoustic meta-equalizer.
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Dates et versions

hal-03043175 , version 1 (07-12-2020)

Identifiants

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Yifan Zhu, Shi-Wang Fan, Liyun Cao, Krupali Donda, B. Assouar. Acoustic Meta-Equalizer. Physical Review Applied, 2020, 14 (1), ⟨10.1103/PhysRevApplied.14.014038⟩. ⟨hal-03043175⟩
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