Chongqing speech recognition center is located in Chongqing Renpin Otolaryngology Hospital. The "Sound Maintenance Center" of Chongqing Renpin Otolaryngology Hospital aims to scientifically analyze the acoustic characteristics of the speaker and the characteristics of the vocal organs, especially the health status of the vocal cords, so as to guide the scientific use of sound, find out the damage of incorrect vocal habits to the vocal cords in time, and correct and treat them.