Research on Designing Outdoor Microphone Protection Structure

Microphones used outdoors must be protected by some structures or components to prevent damage from rain, mist, dust and so on. People usually choose some existing protective components produced by manufacturers. However, few studies have been reported on designing and optimizing the microphone protection structure. In this paper, based on the reciprocity principle and the boundary element method, a numerical simulation model is built, and the protective structure's influence on the microphone's reception performance is obtained. Finally, the correction value of sensitivity is measured by experiments in an anechoic chamber and a reverberation room. This method is fast and effective and has a good effect on the design and optimization of the microphone protection structure.