Parts of the ear
What is the outer flappy part of the ear called?
Pinna
Sound is caused by __________.
Vibrations
Measures how high or low a sound is
pitch
back and forth movement that causes sound.
vibration
A substance through which a wave can travel?
Medium
Which part of the ear acts as a sound collector?
Outer ear
Decibels
Unit measuring loudness
decibel
when a wave bounces after hitting a barrier.
reflection
The larger the _____________ the louder the sound.
amplitude
After the eardrum causes the three tiny bones to vibrate, those tiny bones make the fluid in the ___________ vibrate.
cochlea
Where is there NO sound?
space
Unit measuring pitch
Hertz
the finding of an object using reflected sound.
echolocation
Harder surfaces reflect more or less sound than softer surfaces?
more
Name the three tiny bones in the middle of the ear.
Hammer, Anvil, Stirrup
When sound waves cause the eardrum to vibrate, these vibrations are immediately passed on to the_________.
Three small bones the middle of the ear (hammer, anvil, stirrup)
Measures how well a sound can be heard
loudness
occurs when waves transfer energy to particles of matter.
absorption
Softer surfaces reflect more or less sound than harder surfaces?
less
What happens in the inner ear?
sound waves are converted to nerve impulses.
How does increasing the amplitude of a sound wave affect the sound?
It makes the sound louder
A longitudinal wave that is caused by vibration traveling through a medium.
sound wave
carries electrical signals from the cochlea to the brain.
auditory nerve
Pitch is dependent on the _____________ of a wave.
frequency