high pitch; higher tone
Refers to a voice or sound that is higher in pitch than normal, often used in musical or vocal contexts.
His voice gets higher-pitched when he is nervous.
This song is generally high-pitched and hard to sing.
Compound of 上 (うわ, 'upper') and 調子 (ちょうし, 'tone, pitch'). The exact historical derivation is uncertain, but the meaning is transparent from its components.