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Wind Chimes are made of objects, such as metal spoons, that produce sound waves when the objects bump into each other.
Please see below for some sound energy activities you could do at home
Make your own sound energy activities using wind chimes by following these steps.
Just as the strings inside a piano create different sounds, so will the rubber bands,
when stretched around a shoebox or a plastic ice cream cups. When the rubber bands are plucked in order, from thinnest to thickest, the sound will gradually change from a high pitch to a low pitch.
For this you will need an old plastic recorder and a tall jug of water.
Cover all the holes on the recorder with your fingers or stick some tape over the holes. Blow gently into the recorder and you should heat a single, low pitched note.
Take a deep breath and blow into the recorder while you push it into a jug of water.
Find four glass beakers which are of same size and shape.Fill one beaker with water almost to the top.In the second beaker make the water level about 6 cm from the top of the glass. In the third beaker, make the level 10cm from the top. Don’t put any water in the fourth glass.
Tap the side of each glass with a wooden spoon. Each glass will ring with a note of a different pitch (more water the lower the pitch.)
Strike a tuning fork on the floor, or on the edge of the table. Watch
and listen. And now, MAKE A BIG SPLASH! Put the vibrating tuning fork into a glass
of water now you will see the generation of waves.
Now, hold a ping pong ball suspended on thread in your left hand. Strike the tuning fork again. Touch the ping pong ball with the tuning fork. Watch.
As you blow into a bottle, you set the air in motion. As the particles of air moved
back and forth, they formed a sound wave. This sound emerged from the neck of the
bottle as a distinct note. The pitch of the sound varies, depending on whether the bottle is
filled or empty.
Tie a string to a coat hanger and tie a pencil in other end of the string.
The coat hanger hitting a solid object would vibrate and act as the source of the
sound. The vibrations travel through the string and the pencil to the ears. As the
string and pencil are solids, it is much easier for the sound waves to travel through them
than through the air. It is the vibrations of the pencil that are immediately transferred to
the ears, that make the sound so audible.
Good Vibrations - Sound energy activities
This activity uses an empty coffee can with a lid. Rice is placed on the lid. A
student strikes the rim of the coffee can with a spoon. Thus good vibrations are produce.