Scientists have long listened to the ocean, but new technology is helping to piece together a far more complex picture of life beneath the waves. Here, BBC Future lets you listen in.

The worms, grubs and roots rummaging unseen beneath our feet produce a cacophony of sounds that we are only just starting to listen to and understand.

Inspired by neuroscience, a specially designed siren designed to capture attention is finding a smart and potentially life-saving use in Africa.

Is it as common as many people think? Adam Rutherford and Hannah Fry investigate in the animated clip above, inspired by their BBC Radio 4 programme.

The world’s flashiest loudspeakers are a mix of extreme engineering and unreal aesthetics. But can the astronomical price tags be justified? Chris Baraniuk finds out.

Many sounds are added to films and TV using everyday objects, and the process can be a strange and fascinating thing to watch, as this short film reveals.

The sounds added to movies, TV and sport often have unusual origins, says William Park, from everyday objects to manipulated animals.

Unidentified rumbles and noises like those heard in the US and UK this week are surprisingly common worldwide, says David Robson. What's behind them?