audiocipher
nounUK /ˈɔːdiəʊˌsaɪfə/
US /ˈɔːdioʊˌsaɪfər/
A secret code that is hidden inside a sound.
The spy used an audiocipher to hide the message in a song.
RELATED WORDS
OTHER MEANINGS
2. A tool that turns scrambled sounds back into clear speech.
She ran the recording through an audiocipher to hear what was said.
3. A pattern of beeps that only certain machines can understand.
The modem sent an audiocipher over the phone line.
4. A puzzle where you must listen carefully to decode a hidden word.
The radio show ended with a fun audiocipher for listeners to solve.