C1887 Ancestor Wang Shizhong
To lose one's voice, as the name implied, meant that one was unable to make a sound.
A mute doesn't know how to speak, so it's not called speechless.
Only a normal person who was suddenly speechless could be called a person who had lost his voice.
There are many reasons for this.
For example, crying without a sound. A person's heart was broken to the extreme