na-adjective, noun
audible
Technical or formal term for sounds that can be heard; often used in fields like acoustics or broadcasting.
この周波数は可聴範囲外です。
This frequency is outside the audible range.
可聴信号を検出する装置。
A device that detects audible signals.
Common everyday verb for 'can be heard'; 可聴 is a more technical, noun/adjectival noun form.
Compound of 可 (ka, 'possible') and 聴 (chō, 'hearing'), literally 'hearable'. The exact historical derivation is uncertain, but the spelling is conventionally associated with audibility.