Bio-mimicry Sound Source Localization with Gimbal Diaphragm

Abstract

The parasitoid fly Ormia Ochracea shows a remarkable ability to detect the direction of an incident sound even though its ears are in very close to each other, where the interaural differences in intensity and time are extremely small.In this paper, with mimicking the unique auditory organ of the fly, we propose a sound source localization mechanisms with a gimbal diaphragm which realizes a simple and optimal transduction mechanism for a very small pressure gradient caused by the sound field.We made a model sensor using a thin metal plate and confirmed that it localizes the direction of the sound source by experiments.