| 基于等倾干涉的声波解析实验 |
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| 引用本文： | 何友武,吴丽珠,邱彩敏.基于等倾干涉的声波解析实验[J].大学物理实验,2014(6):18-20. |
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| 作者姓名： | 何友武 吴丽珠 邱彩敏 |
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| 作者单位： | 福建师范大学,福建 福州,350007 |
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| 摘 要： | 激光检测的音频解析系统是将激光射在声源附近的玻璃表面,玻璃受到声压作用发生微弱同频率振动,激光照射到玻璃后上下表面返回的光发生等倾干涉,且玻璃振动引起反射光斑位置发生移动,光斑位移量与玻璃振动幅度成线性关系,通过检测干涉光斑位移引起的光强变化并对接收到的光信号进行光电转换和放大解析实现声音的还原。
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| 关 键 词： | 振动 等倾干涉 声波调制 信号处理 |
Sound Signal Restore Experiment Base on Equal Inclination Interference |
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| HE You-wu,WU Li-zhu,QIU Cai-min.Sound Signal Restore Experiment Base on Equal Inclination Interference[J].Physical Experiment of College,2014(6):18-20. |
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| Authors: | HE You-wu WU Li-zhu QIU Cai-min |
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| Institution: | (Fujian Normal University, Fujian Fuzhou 350007) |
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| Abstract: | The laser occur equal inclination interference when incident on the up and down surface of the glass. The sound pressure induced micro-displacement of the glass,if the glass vibrated vertically at the approximate incident point of t he laser,the interference spot will move linearly. Measuring the movement of the interference spot and changing optical signal into electrical signal to achieve the sound signal restore. |
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| Keywords: | vibrate equal inclination interference sound signal modulate signal processing |
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