An animated sequence that describes how sounds occur when objects vibrate. The clip illustrates the route sound waves take through the air to our ears, causing messages to be sent to our brains as we recognise or ‘hear’ a sound. We are told that the faster something vibrates, the higher the note it produces.
Pupils could follow up on what they find out in the clip by trying to see and feel sound vibrations, as well as hearing them. You could ask the children to hum a tune. While they are humming, ask each of them to put a finger on their throat. Can they feel their throat vibrating? Pupils could try twanging a guitar string: they should notice the string slows down and stops moving as the sound it makes fades. Another good way for pupils to visualise vibrations is to scatter grains of rice on a drum skin. When the drum is tapped, the grains of rice jump.