aural signal

aural signal

[′ȯr·əl ′sig·nəl]
(acoustics)
A signal that can be heard.
The sound portion of a television signal.
References in periodicals archive ?
When the squadron operations-duty officer (ODO) receives a launch order, he activates an aural signal.
Should the M92D go over the side you can expect it to float faceup and provide visual and aural signals to aid in retrieval.