For many years, the engineering limitations in a single loudspeaker have offered no solution to the problem of delivering sound only to parts of an audience. Precise control on how sound is delivered to an audience has required multiple loudspeakers, either through their distribution or through DSP. The recent uptake of acoustic metamaterials, however, seem to offer different solutions. Using devices based on acoustic metamaterials, for instance, brings to acoustics design principles that come directly from optics, at a reasonable manufacturing cost. In this work, we design, numerically simulate, and characterise an acoustic converging superlens: a 3D-printed device capable of focusing an incoming plane wave at a distance less than one wavelength. We show how a loudspeaker at a fixed distance from the lens results in an “image” of the source at a distance prescribed by the thin-lens equation. Finally, we propose possible applications of such an acoustic superlens to future audio experiences.
Authors:
Chisari, Letizia; Ricciardi, Enrico; Memoli, Gianluca
Affiliations:
Metasonixx Ltd, London, UK; Labirinti Acustici, Milan, Italy; University of Sussex, Brighton, UK(See document for exact affiliation information.)
AES Convention:
152 (May 2022)
eBrief:672
Publication Date:
May 2, 2022
Subject:
Loudspeakers and headphones
Download Now (535 KB)
This paper is Open Access which means you can download it for free.
No AES members have commented on this paper yet.
To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.