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Sound Study Guide


the energy in a sound wave.


the number of times a sound source vibrates in one second.


the highness or lowness of a sound as determined by its frequency.

sound wave

an area of bunched up and spread out air particles that moves outward in all directions from a vibrating object.


the back and forth motion of an object.

What causes sound?

Sound is produced by back and forth motions.

Sound depends on air to do what?

carry the sound waves

A tuning fork produces

vibrations when it is struck

Our vocal cords do what when we sing and talk


What materials do sound travel through

gas, liquid and solids

Sound travels the fastest through what material

a solid

Sound travels the slowest through what material

a gas

The eardrum vibrates like what?

a drum

The middles ear has how many vibrating bones?


What are the vibrating bones of the middle ear?

anvil, hammer and stirrup

What else is in the inner ear that also vibrate?

vibrating fluid and fine hair cells

Sound waves travel through what on the body?

the skin, bone and nerve tissue

Why aren't all sounds the same?

Every sound wave has a wavelength, frequency and amplitude.

What tools help us hear?

amplifier,stethoscope, speakers

An amplifier does what?

gives the hearing aid more energy


an instrument that allows a doctor to hear heart and lung sounds

Speakers do what?

change sound into electrical energy

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