| The M31 is a low voltage electret condenser microphone specifically designed for the measurement of transducers, loudspeaker systems, room response, and other similar acoustic characteristics. The M31 provides a very cost effective solution to many general purpose acoustic measurements. This microphone features low cost, wide smooth frequency response, small size, and easy interface/power requirements.M31是一种低电压驻极电容麦克风，专门用于测量传感器、扬声器系统、房间响应和其他类似的声学特性。M31为许多通用声学测量提供了一个非常划算的解决方案。该麦克风具有低成本，宽平滑频率响应，小尺寸，和简单的接口/电源要求。这个小直径(0.3英寸)和这个麦克风的大小使得这是一个很好的选择在近场测量和在其他地方的空间是一个额外的。小直径对高频测量也产生较少的方向性灵敏度。低电压和电流要求的麦克风/前置放大器允许方便的设置和操作从各种各样的电源供应，甚至可以使用标准的9V电池供电 |