Sound investigation

This afternoon we heard the story of Sleeping Beauty and talked about what noises wake us up when we're asleep! We said things like ticking clocks, alarm clocks, thunder, dogs barking, music, birds and people talking.

Then we did an investigation to find out how far away we can go and still hear a noise. The noise we tested was a bell ringing. We went to the bark area and measured out one metre. Then we all stood in a line and Miss Ayres rang the bell. We all heard it, so we recorded it on our piece of paper - 1m and a tick. Then we measured another metre, and another, and kept going until we couldn't hear it anymore! How far away do you think we were before we couldn't hear the tinkling bells anymore?

We could still hear the bells 10m away, but most of us couldn't hear it when we were 11m away. Do you think we could hear a louder noise at 11m? Or further?