Sounds and Vibrations
- Sound is made up of vibrations, or sound waves, that we can hear.
- These sound waves are formed by objects vibrating (shaking back and forth).
- Sound waves travel through air, water, and solid objects as vibrations.
- When they reach our ears, these waves make the delicate skin of the eardrums vibrate.
- An instrument creates sound when part of it vibrates rapidly.
A drum makes noise by vibrating and so do your vocal chords. Can you list three other things that make noise by vibrating?
Activity: Create a Comb Kazoo
A kazoo is an instrument that makes sound when you hum into it. So, if you can hum a tune, you can play a kazoo!
An ordinary kazoo also has a small sheet of tissue paper inside it and humming into the kazoo causes that paper to vibrate, making a buzzing sound. Kazoos are like drums (like the Bodhrán Ray showed you in the lesson), because they make sound by vibrating stretched material.
Send us pictures or videos of what you have done. Ask your parents to help you send them to rte.ie/learn