高声压级低失真电容传声器技术探究  

High Sound Pressure and Low Distortion Condenser Microphone Technology

作　　者：高硕[1] 周瑜[1] 马春宇 王勇[1] 张乐意 GAO Shuo;ZHOU Yu;MA Chunyu;WANG Yong;ZHANG Leyi(The Third Research Institute of China Electronics Technology Group Corporation,Beijing 100015,China)

机构地区：[1]中国电子科技集团公司第三研究所,北京100015

出　　处：《电声技术》2020年第7期48-50,54,共4页Audio Engineering

摘　　要：对电容型传声器的最大声压级和失真度的影响因素展开研究,基于圆形固支振膜模型推导传声器最大声压级和失真度的计算方法,并在此基础上设计并制作了高声压级低失真传声器样机,同时通过实验证明了最大声压级和失真度模型的有效性。实验结果表明,传声器最大声压级能够达到180 dB以上,失真度小于1%,频响范围0.02~20 kHz,能够指导高声压传声器参数设计,可应用于军事、航天高声压级噪声测试领域。In this paper,we studied the influence factors of maximum Sound Pressure Level(SPL)and distortion of capacitive microphone and deduced the calculation method of them,based on the circular fixed diaphragm model.On this basis,we designed a microphone prototype with high SPL and low distortion.The validity of this method is verified by experiments.Experimental results show that the maximum SPL can reach more than 180 dB,the distortion is less than 1%,and the frequency response range is beyond 0.02~20 kHz.The research in this paper can guide the parameter design of high SPL microphone,which will be used in the field of high SPL noise measurement in military and aerospace.

关 键 词：高声压测试 失真度控制 电容型传声器 

分 类 号：TN641[电子电信—电路与系统]