sound-only
adjectiveUK /ˈsaʊnd ˈəʊnli/
US /ˈsaʊnd ˈoʊnli/
Something that is sound-only has just sound and no pictures.
We listened to a sound-only story on the radio.
OTHER MEANINGS
2. Using only sound to share information, without any video.
The sound-only announcement told passengers which gate to use.
3. A recording or broadcast that has no pictures.
She prefers sound-only podcasts when she walks to school.
4. Describing a device that plays or records sound but not video.
This sound-only player is small enough to fit in your pocket.