Xiaoling Yin1, Yun Zheng2. 1. Hearing Center/Hearing and Speech Laboratory, Department of Otorhinolaryngology Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China. 2. Hearing Center/Hearing and Speech Laboratory, Department of Otorhinolaryngology Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China. 1141679315@qq.com.