Simple prompts - sound

Simple prompts for a lazy time of year (northern hemisphere anyway!)

Is there a sound which you associate with a particular memory? For me it's the sound of the ropes on sailing dinghies and yachts flapping against the masts - not a sound I hear often except when visiting a harbour or sailing beach - which is very rare in my life - but it reminds me of the seemingly endless summers we spent in North Wales on holiday when I was a child. It was a big sailing area, and the breezes set the ropes flapping onthe masts and that sound takes me back to my childhood like no other...

Write about a particularly significant sound.