谐振式超磁致伸缩音频驱动器设计

Resonate giant magnetostrictive audio actuator

超磁致伸缩驱动器具有输出振幅过小导致转换效率不高的问题,针对此问题提出了谐振式超磁致伸缩音频驱动器的理念,利用音叉的机械结构实现了超磁致伸缩驱动器振幅的放大,同时利用音叉的频响曲线去修正超磁致伸缩驱动器的频响曲线,以提升扬声器响度。研究了音叉的选择,及其中超磁致伸缩驱动器的具体设计过程,并在专业消音室对谐振式超磁致伸缩音频驱动器进行了性能测试,测试结果表明驱动器改进后超磁致伸缩扬声器在音响上有显著提升。

The giant magnetostrictive actuator has a problem of limited output amplitude,and this problem causes low transform efficiency.In order to solve the problem,resonate giant magnetostrictive actuator was put forward,which using the tuning fork＇s mechanical structure to improve the output amplitude and using the tuning fork＇s frequency response to improve giant magnetostrictive actuator＇s frequency response.The choosing of tuning fork was studied and the design process of giant magnetostrictive actuator was described in detail.Finally,some performance test was made in professional anechoic chamber for the resonate giant magnetostrictive actuator.The result shows that the giant magnetostrictive with audio actuator has a remarkable improvement in loudness.