不同手机及不同通信网络通话录音质量评析
申小虎1, 金恬2, 王雷3, 韩朝阳4

Evaluation on Quality of Voices Recorded from Testing into Different Mobile Phones and Telecom Networks
SHEN Xiaohu1, JIN Tian2, WANG Lei3, HAN Chaoyang4
平均频谱曲线