A picture is worth a thousand words is an old over-used favourite of a saying, but not many people would think that a single sound can have the same effect. It seems incredible, but just hearing the first chimes of Big Ben, the bell in the clock tower at Westminster, and people all over the world would identify it immediately with London. Sounds can be so important parts of our culture and our lives. A favourite tune, a song shared with your family, the school bell, the sound