表面传声器校准技术研究

Study on Surface Microphone Calibration Technology

表面传声器作为风速环境噪声测量工具广泛应用于航天、车辆领域,但由于其为扁平型结构,且前端无腔体,所以无法用常规手段进行多频率点的校准。本文研究一种表面传声器校准技术,采用扁平型非对称短耦合腔、大直径扁平表面传声器安装压盖等思路,经仿真分析与试验验证,可以有效地对表面传声器进行多频率点校准。

As a measurement tool of wind speed environmental noise,surface microphone is widely used in aerospace and vehicle fields.It is a flat structure and has no cavity in the front end,so it can only be calibrated by conventional means.In this paper,a kind of surface microphone calibration technology is studied.The methods of flat asymmetric short coupling cavity and large diameter flat surface microphone mounting gland are adopted.Through simulation analysis and test verification,the surface microphone can be calibrated effectively.