Microscale Devices for Biomimetic Sound Source Localization: A Review

Over the last decades, the sub-wavelength hearing capability of small living creatures has been received huge attention in developing microscale biomimetic sound source localization (SSL) devices. The key challenge here is to extract the SSL cue since the device dimensions are significantly small. Several works have been documented in this area imitating the hearing mechanism of various small living creatures. To understand their efficacy and usability, this review paper aims to summarize the most recent biomimetic SSL approaches. At first, the reader will be directed through a general overview of the conventional stereo/multi-channel SSL approaches. Secondly, the necessity of biomimetic SSL has been presented, especially by focusing on the need at the application-end. Thirdly, the merits and demerits of each technique have been reviewed. At the end, the future perspective has been presented that will make a paradigm shift in designing next-generation microscale devices for biomimetic SSL. [2021-0143]