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.
The purpose is to see to it that what is shown and heard on the old radar are exactly the same visual and aural signals that show up on the new CNS/ATM system.
It will feature a mock pedestrian and train crossing, a bus stop with a shelter and roadside kerbing, functional traffic lights with aural signals, open and closed stairs, and a mock cafe.
Should the M92D go over the side you can expect it to float faceup and provide visual and aural signals to aid in retrieval.