摘要
利用激光反射法改进了激光监听器在音质等方面的监听效果.采用硅光电池探测激光器反射的光斑,使用遥控微调电机调节光斑对准,由声卡采集探测信号,电路采用巴特沃斯带通滤波器,还利用Matlab中的audio weighting filter进行信号处理和滤波.实验结果表明监听信号准确、清晰.
Reflection method was used to improve the quality of laser monitoring, The reflected laser spots were detected by silicon photocell and tracked by remote controlled fine motor. The signal was collected by sound card. Butterworth bandpass filter was used in the circuit and Matlab audio weighting filter was adopted for signal processing and filtering. The results indicated that this method could monitor clearly and accurately.
出处
《物理实验》
2013年第9期6-9,共4页
Physics Experimentation
