| 用激光自混合干涉测量扬声器的Q值 |
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| 引用本文： | 胡险峰.用激光自混合干涉测量扬声器的Q值[J].物理实验,2011,31(4):18-20,23. |
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| 作者姓名： | 胡险峰 |
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| 作者单位： | 四川大学物理科学与技术学院,四川,成都,610064 |
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| 摘 要： | 用激光自混合干涉方法测量扬声器振动,从扬声器振动引起的自混合干涉信号测量扬声器振动速率.由正弦波激振扬声器测量振速的幅频特性曲线,谐波中包含扬声器谐振频率的方波激振扬声器测量振速衰减曲线,分别按谐振法和衰减法测量得到扬声器的品质因数约13.3和10.2.由于方波激励时扬声器有谐波振动成分,由方波激励获得的衰减曲线测量得...
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| 关 键 词： | 振动测最 品质因数 激光二极管 自混合干涉 |
Measuring Q factor of speaker with laser self-mixing interference |
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| HU Xian-feng.Measuring Q factor of speaker with laser self-mixing interference[J].Physics Experimentation,2011,31(4):18-20,23. |
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| Authors: | HU Xian-feng |
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| Institution: | HU Xian-feng(College of physical science and technology,Sichuan University,Chengdu 610064,China) |
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| Abstract: | Vibration of speaker was measured by laser self-mixing interference.Vibration rates were measured from the signal of self-mixing interference caused by speaker vibrating.The curve of amplitude-frequency was measured at sinusoid signal stimulation.The attenuation curve of the vibration amplitude was measured at stimulation of square signal whose harmonic frequencies included the resonant frequency of the speaker.The Q factor of the speaker was about 13.3 and 10.2,respectively measured by resonance method and... |
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| Keywords: | vibration measurement Q factor laser diode self-mixing interference |
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