Department of Aerospace and Systems Engineering, Feng Chia University, Taichung, Taiwan, Republic of China.
IEEE Trans Ultrason Ferroelectr Freq Control. 2011 Feb;58(2):461-9. doi: 10.1109/TUFFC.2011.1823.
In this study, an analytical model based on the equivalent circuit method is developed to simulate the frequency response of an insert earphone. This earphone incorporates a miniature loudspeaker commonly used in computer, communication, consumer, and car electronics. Through the laser triangulation method, electroacoustic parameters of a miniature loudspeaker are obtained. Several earphone design configurations are analyzed in accordance with the open and closed states of front leakage hole, vent, and back leakage hole. To validate the analysis, an insert earphone that is attached to IEC-60711 coupler and a specially designed fixture tube is experimentally measured for frequency response using electroacoustic equipment in the air. Simulation and experimental results show good agreement over the complete audible frequency range. Analysis indicates that states of front leakage hole, vent, and back leakage hole of an insert earphone have significant effects on frequency response. The front leakage hole affects the low frequency response, whereas the vent affects the fundamental resonance. Detailed analysis has been provided to further improve the design of insert earphones.
在这项研究中，开发了一种基于等效电路法的分析模型，用于模拟插入式耳机的频率响应。这种耳机采用了微型扬声器，常用于计算机、通信、消费和汽车电子领域。通过激光三角测量法，获得了微型扬声器的电声参数。根据前漏孔、通气孔和后漏孔的开启和关闭状态，分析了几种耳机设计结构。为了验证分析，使用空气中的电声设备，对连接到 IEC-60711 耦合器和专门设计的固定管的插入式耳机进行了实验测量，以获得其频率响应。仿真和实验结果在整个可听频率范围内吻合较好。分析表明，插入式耳机的前漏孔、通气孔和后漏孔状态对频率响应有显著影响。前漏孔影响低频响应，而通气孔影响基频共振。提供了详细的分析结果，以进一步改进插入式耳机的设计。
