Ljudjakt - Radioapans

Radioapan played a 4-second clip: a low, metallic groan followed by what sounded like a human whisper saying "tjugo" (twenty). Thousands guessed it was a train brake. Others guessed a whale song recorded through a ship's hull. The answer, revealed after three months of desperate hunting? The sound of a frozen ice cube tray being twisted inside a vintage Electrolux freezer, with the "whisper" being air escaping from a sealed rubber gasket. No one got it right.

You can still listen to dedicated segments where Radioapan collects sounds on the Radioapan samlar på ljud program page. Sveriges Radio Characters and Collaborators Radioapan is often joined by his friends Allan the Elephant Production: radioapans ljudjakt