soundcode
nounUK /ˈsaʊndkəʊd/
US /ˈsaʊndkoʊd/
A soundcode is a secret set of sounds that stands for something.
The bird's song was a soundcode that told other birds danger was near.
OTHER MEANINGS
2. A pattern of beeps or tones used by a machine to share information.
The washing machine played a soundcode when the clothes were done.
3. A way of turning letters or words into sounds so they can be sent and understood.
The radio used a soundcode to send the message across the sea.
4. A special sound a person learns to recognize, like a whistle or knock.
The club members knew the soundcode at the door and let their friend in.