Super Pinna, The outer part of your ear is called the pinna, it collects sound and directs it to your eardrum. By changing the shape of your pinna you can change how you hear sound. Make a cone from construction paper, cut off the pointy end so that it fits over your pinna. You now have a super pinna. Experiment with the shape of your super pinna.
To make a super pinna cut a circle out of construction paper. Cut a pie slice out of the circle. Tape the edges of the pie slice together to make a cone. Then cut off the end of the cone.
helium balloon, CO2 balloon. feel the sound
Scientific Explorations with Paul Doherty
8 November 2004