耳机被动降噪特性分析

在近似扩散场条件下,测试了入耳式和耳罩式耳机的被动降噪曲线,基于测试结果和线路图模型仿真,对影响耳机被动降噪特性的因素进行了探究和理论分析。结果表明无论是对与人耳紧密耦合的入耳式耳机,还是将人耳罩住的头戴耳机,耳套是影响耳机被动降噪能力的重要因素。

Passive noise reduction analysis of earphones

The passive noise reduction response curve of insert earphone and circum-aural earphone were measured in diffused field.Factors which have impact on the PNR characteristics of earphones were analyzed based on the measurement results and circuits model simulation.The results shows that the design of ear tip or cushion are important for both insert and circum-aural earphones to achieve good PNR performance.