Sound (Science Experiments)
How is sound measured?
Wave Length: How does the length of a vibrating string affect the sound it produces?
Design Your Own Experiment
You hear sound when vibrations enter your ears and send signals through your nerves to your brain. These vibrations are caused by disturbances in the air. For example, when you hit a drum, the top of it vibrates, causing a disturbance in the molecules in the air. This vibration, or sound , travels through the air in all directions, eventually reaching your ears.
If you could see sound waves, they would look much like the waves you see when you drop a stone onto a calm water surface.
Sound waves travel through air at about 1,088 feet (332 meters) per second. When the sound waves or vibrations reach your ears, they push on your eardrums and cause them to vibrate. Each eardrum pushes against a series of three tiny bones in your middle ear. These tiny bones push against another membrane, which causes waves in a fluid inside your inner ear. Here, special cells pick up the differences in pressure from the waves and transform...
(The entire section is 2350 words.)
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