natural voice; normal speaking voice
Refers to one's unforced, everyday voice, as opposed to a put-on voice or falsetto.
緊張すると地声が出なくなる。
When I get nervous, I can't speak in my normal voice.
彼女の地声は
chest voice; modal voice
Technical term in vocal pedagogy and phonetics; the normal speaking register produced by the vibration of the vocal folds.
歌手は地声と裏声を使い分ける。
Singers use chest voice and falsetto differently.
Her natural speaking voice is very calm.
Compound of 地 (ji, 'base' or 'natural') and 声 (koe, 'voice'), literally 'base voice'.