can you hear it? (almost) everything you need to know about sound

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Sound Can You Hear It? (Almost) Everything You Need to Know About Sound

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Page 1: Can You Hear It? (Almost) Everything You Need to Know About Sound

SoundCan You Hear It?

(Almost) Everything You Need to Know About Sound

Page 2: Can You Hear It? (Almost) Everything You Need to Know About Sound

Good, Good, Good, Good Vibrations!!!!

Sound is the movement of air. Sounds begin when something

vibrates, or quickly moves back and forth.

For example, a guitar string begins vibrating and a sound is produced.

Another example- our vocal cords vibrate when we talk or sing.

Sound carries energy. This is why loud sounds hurt our ears.

Page 3: Can You Hear It? (Almost) Everything You Need to Know About Sound

Moving Sound Sound travels in

waves called sound waves.

Page 4: Can You Hear It? (Almost) Everything You Need to Know About Sound

The Speed of Sound Sound travels through different

materials at different speeds. Sound travels through solids faster

than liquids or gases. Check out how fast sound travels

through different materials:• Air- 330 meters per second• Water- 1,500 meters per second• Wood- 4,000 meters per second• Granite Rock- 6,000 meters per second

Page 5: Can You Hear It? (Almost) Everything You Need to Know About Sound

Bang That (Ear)Drum!!! How Do We Hear Sound?

Sound goes through the ear canal, hits the eardrum and causes a vibration. The sound enters tubes in the inner ear. Then it travels through nerves to the brain.

Page 6: Can You Hear It? (Almost) Everything You Need to Know About Sound

Different Sounds: Why Aren’t All Sounds the Same?

Each sound has a different wavelength. A wavelength is the distance from one area of squeezed particles to another.

Page 7: Can You Hear It? (Almost) Everything You Need to Know About Sound

Different Sounds (continued)

Every sound has a different frequency. Frequency is the number of times a sound source vibrates in one second.

Frequency determines pitch, or how high or low a sound is.

Fast vibration = high frequency = high pitch

Slow vibration = low frequency = low pitch

Page 8: Can You Hear It? (Almost) Everything You Need to Know About Sound

Different Sounds (continued)

Amplitude is the amount of energy in a sound wave.

High amplitude = high loudness or volume

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