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未知耦合腔体积活塞发声器声压级的检测   总被引:2,自引:0,他引:2       下载免费PDF全文
张明铎 《应用声学》2002,21(6):28-31,35
本文简要介绍了活塞发声器的工作原理及其声压级的测量原理,着重分析了未知耦合腔体积活塞发声器的有效体积与声压级的测量方法。  相似文献
2.
A laser pistonphone for the absolute calibration of microphones at low frequencies has been developed at UME. The motion of an electro-dynamically driven piston in a small close cavity produces a sound pressure. Accurate measurement of the piston displacement, by self-mixing interferometry, enables this sound pressure to be calculated, and consequently the pressure sensitivity of a microphone, exposed to this sound pressure, to be determined. Absolute calibrations of type LS1P and WS1P microphones have been carried out with an uncertainty of less than 0.15 dB. The performance of the laser pistonphone has been validated by comparing the measured microphone sensitivities with those obtained by the closed coupler reciprocity method.  相似文献
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