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首页> 外文会议>Audio Engineering Society international convention >Loudspeakers as Microphones for Infrasound
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Loudspeakers as Microphones for Infrasound

机译：扬声器作为麦克风的麦克风

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摘要

This paper shows that a sealed-box loudspeaker can be used as the sensor for a very high-performance infrasound microphone. Since the cone displacement essentially responds directly to infrasound pressure, the velocity-induced loudspeaker output must be electronically integrated to give a flat response. The undamped resonance peak of the loudspeaker is avoided by feeding the short-circuit voice coil current into the virtual ground input of an integrator opamp. Design equations are given and a complete response analysis is presented. A prototype is compared with a conventional microphone used for infrasound measurement, showing the improved performance of the sealed-box loudspeaker design.
机译：本文表明，密封箱扬声器可用作非常高性能的基础麦克风的传感器。由于锥形位移基本上直接响应了射力，因此必须以电子整合的速度引起的扬声器输出以提供平坦的反应。通过将短路音圈电流馈送到积分器Opamp的虚拟接地输入，避免了扬声器的无法衰减的谐振峰值。给出了设计方程，并提出了完整的响应分析。将原型与用于基础测量的传统麦克风进行比较，显示密封盒扬声器设计的改进性能。

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