中文说明：通过录制音频数据，研究在使用DSB-LC方法调制信号之后，在解调过程中由频偏所造成的对解调结果的影响，以便了解DSB-LC系统对频偏的敏感特性。
English Description：
Using the recording audio data, study of modulation signal using the DSB-LC method, demodulation process consists of frequency deviation caused by the effect of demodulation in order to understand the sensitivity of DSB-LC system for frequency offset.