It’s got a massive library of sleep sounds. We’re talking all sorts of white noise, nature sounds like wind in palm trees, and even… a metro train? Okay, we admit that one threw us for a loop.

Thomas Hardy wrote that people could identify a tree by its susurration - the sound of leaves in the wind. In Radio 4's The Susurrations of Trees, producer Julian May and writer Bob Gilbert ...

Thomas Hardy wrote that people could identify a tree by its susurration - the sound of leaves in the wind. In Radio 4's The Susurrations of Trees, producer Julian May and writer Bob Gilbert ...