The Ear Flashcards
(16 cards)
How do we hear?
We detect sounds because parts in our ears work together to turn sound waves into signals that are sent to the brain
What is an ear drum?
An ear drum is a thin flap of skin that is stretched tight like a drum
It vibrates when sounds waves hit it
What are the ear bones
There are 3 small bones called hammer anvil and stirrup
What is a cochlea?
A cochlea looks like a snail’s shell in the ear
When bones move, fluid in the cochlea moves .
This movement sends signals to the brain
What is the auditory nerve?
An auditory nerve carries signals from the cochlea to the brain
What is the pinea?
A pinea is the bit of the ear that we can see - the outer ear
What is a sound wave?
A sound wave is a vibration that travels through a solid, a liquid or gas such as air.
What is a longitudinal wave?
A longitudinal sound wave is where the sound vibration travels in the direction of energy transfer
Eg like a slinky
What is a transverse waves
A transverse sound wave is where the sound vibrations are at right angles to the direction of wave travel eg a wave at sea
What is the wave rest position?
Rest position is the undisturbed particles when not vibrating eg have a guitar but not playing
What is a wavelength?
A wavelength is a distance covered by the vibration of a sounds wave
usually we measure peak to peak or trough to trough ie highest point to highest point or lowest to lowest.
What is frequency?
Number of waves/vibrations passing a point each second
It is Measured in hertz - hz
Eg 50hz means 50 vibrations/waves per second
What is a peak in sound wave?
It is the highest point of sound frequency
What a trough
A trough is lowest point below rest point.
What is pitch?
The pitch of sound is related to how quickly the air vibrates when sound is created.
high pitch = higher frequency
What does it mean if I see a sound wave that starts with more gaps in the wave and then closer together.
It means the sound wave is going low to high frequency
