Acousto-Optical Volumetric Sensing of Acoustic Fields

The characterization of sound fields over space is fundamental in acoustics. Yet, the volumetric acquisition using conventional electromechanical transducers challenging due to high sampling requirements needed a three-dimensional domain. In this study, we introduce an acousto-optic sensing method remotely sample acoustic volume sparse set noninvasive optical measurements. Optical methods that use light as element have drawn significant attention recently, since they allow for remote, with fine spatial resolution. practical deployment acoustics, however, has been hindered by limited data available, and unsuitability existing reconstruct scarce-data regimes. proposed methodology relies on projecting measured basis satisfies wave equation, thus alleviating measurement associated traditional reconstruction methods. approach leads accuracy improvements 20 dB relative current methods, 90% reduction data. We demonstrate experimentally reconstructing situ field inside room from remote measurements interaction. These results are key advancing acousto-optical which currently simplified domains. work presented paper brings about possibility solve so far intractable problems, such complex fields.