Can You Hear It? (Almost) Everything You Need to Know About Sound
Post on 03-Jan-2016
Embed Size (px)
SoundCan You Hear It?(Almost) Everything You Need to Know About SoundGood, 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.Moving SoundSound travels in waves called sound waves.
The Speed of SoundSound 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 secondWater- 1,500 meters per secondWood- 4,000 meters per secondGranite Rock- 6,000 meters per secondBang 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.Different Sounds: Why Arent All Sounds the Same?Each sound has a different wavelength. A wavelength is the distance from one area of squeezed particles to another.
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 pitchSlow vibration = low frequency = low pitchDifferent Sounds (continued)Amplitude is the amount of energy in a sound wave.High amplitude = high loudness or volume