Acoustic Meta-Equalizer
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.
Domaines
Physique [physics]
Origine : Fichiers produits par l'(les) auteur(s)