voice quality; type of voice
Refers to the distinctive character or timbre of a person's voice, often used in contexts like voice acting, singing, or describing vocal characteristics.
彼女の声質はとても落ち着いている。
Her voice quality is very calming.
Voice actors use different types of voices depending on the role.
Compound of 声 (voice) and 質 (quality). The reading せいしつ follows the on'yomi of both characters.