You like safe sounds: the dogs lapping at their bowls; the pop of a cork on a bottle of plonk as your mother cooks; the Match of the Day theme tune and Doctor Who-oo-oo. Safe sounds: your name called, two happy syllables from the bottom to the top of the house; your daft ring tone; the low gargle of hot water in bubbles. Half asleep in the drifting boat of your bed, you like to hear the big trees sound like the sea instead.