Waves And Sounds Flashcards
(44 cards)
When are sounds made
When an object vibrates
What does sound travel in
Waves
What do waves carry from one place to another
Energy
What kind of wave is sound
Longitudinal
What does longitudinal mean
That the direction of vibrations is in the same direction as the movement of wave
What does sound travel through the air as a series of
Compressions and rarefractions
When do compressions occur
When particles are closest together
When do rarefractions occur
When particles are the furthest apart
What do sounds waves need to be transmitted
Particles
What does sound travel fastest in
Solids
What does sound travel slowest in
Gases
Where does sound not travel
A vacuum
What three things make up the outer ear
Ear canal pinna and eardrum
What is the function of the three parts of the outer ear
They direct the sound to the eardrum
What does the body use to keep the ear canal clean
Ear wax
What can too much earwax cause
A blockage
What are the three small bones in the middle ear
Hammer anvil stirrup
What is the purpose of the middle ear
Converts sound waves into vibrations
What is the Eustachian tube used for
To equalise air pressure and drain fluid
Where do vibrations go beyond the oval window
The cochlea
What is found in the cochlea
Fluid and small hairs
What do the fibres in the cochlea do
Transmits sounds waves to the brain
What do fibres do in the fluid and why
Sway due to sound
What does the fibres swaying do
Triggers and electrical impulse to the brain
