acousticcode
nounUK /əˈkuː.stɪk kəʊd/
US /əˈkuː.stɪk koʊd/
A special set of sound signals that people use to send a secret message.
The divers used an acoustic code of taps to talk underwater.
RELATED WORDS
OTHER MEANINGS
2. A pattern of musical notes that stands for a word or idea.
The composer hid an acoustic code in the melody.
3. A way of sending computer data using sound waves instead of wires.
The smart speaker received the update through an acoustic code.
4. A secret knock or whistle used by a group to recognize each other.
The club members shared an acoustic code to enter the treehouse.