Science experiments for children – Chladni plates and eidophone. Sound is vibration. The vibrations are transmitted through the air to our ears, and we perceive them as sound. See the sound vibrations is possible with these simple experiments.
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Science experiments for children – Chladni plates and eidophone Experiment 1
Get a bowl of about 20cm in diameter, cover the top with the plastic film, pulling it thoroughly until it is perfectly tight, flat and smooth. Sprinkle a little of fine salt on its surface. Now take a pot and a spoon, put them closer to the bowl and hit with the spoon the bottom of the pot to achieve a sound. You’ll see the salt jump on the film. You can get the same resulting possibilities shouting loud near the bowl.
What happens?
When you hit the pot or cries produce vibrations that are transmitted through the air to your ear and also to the film placed on the bowl.
http://www.unmuseum.org/exsound.htm
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Science experiments for children – Chladni plates and eidophone Experiment 2 Eidophone
Margaret Watts-Hughes invented in 1885 a device called Eidophone, which consists of a wooden resonance chamber with an open end on which is stretched a rubber membrane, sprinkled with sand or other.
The resonating chamber was connected to a tube which was expected to sing.
To make a eidophone you can use a vase of flowers, the rubber of a balloon, and a plastic tube.
Eidophone 1, performed by Esmeralda Conde Ruiz, 2006 steel and latex membrane
http://old.likeyou.com/archives/
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As shown in this video, as she sings in the eidophone on the membrane form beautiful geometric figures. The children will be truly enchanted.
Trio Eidophone (2010 – Work in Progress) – Film / Prototype / Performance
On the basis of the invention by Margaret Watts-Hughes, this is a device of recent design, for three voices.
http://sciencedemonstrations.fas.harvard.edu/
Science experiments for children – Chladni plates and eidophone Chladni plates
Then, of course, they can not miss the Chladni plates, sprinkled with sand or salt and made to vibrate with a violin bow:
Science experiments for children – Chladni plates and eidophone other videos
