natural voice; unamplified voice
Refers to a person's voice heard directly, without electronic amplification or recording. Often contrasted with recorded or broadcast voices.
I spoke in my natural voice without using a microphone.
His natural voice was much gentler than when heard on TV.
He spoke in his natural voice without using a microphone.
A tape recording of the victim's actual voice was made public.
I heard my grandmother's actual voice for the first time in a long while, since I hadn't seen her.
Because it's a small hall, the singer's unamplified voice carries all the way to the audience.