5.2: Detecting sound Flashcards
What are the 3 sections of the ear?
Outer ear, middle ear, inner ear
What does the outer ear consist of?
The pinna, auditory canal, and the eardrum
What does the middle ear consist of?
The ossicles and the oval window
What does the inner ear consist of?
The semicircular canal and the cochlea
What does the pinna do?
It channels sound waves into the auditory canal
What does the auditory canal do?
It transfers sound waves into the eardrum
What does the eardrum do?
It vibrates and makes the ossicles vibrate
What do the ossicles consist of?
The hammer, anvil, and stirrup
What do the ossicles do?
They amplify the sound waves and transfer them into the inner ear
What does the oval window do?
It connects the middle ear and the inner ear
What does the semicircular canal do?
It is a fluid-filled tube that helps keep our balance.
What does the cochlea do?
It is a snail-shaped organ that converts the sound waves into electrical signals to send to the brain
What can cause hearing loss?
Loud sounds, excessive wax, head injuries, and ear infections
What will loud sounds do?
It will perforate eardrums. It takes a while to heal
What will excessive wax do?
It disturbs the transfer of sound waves to the eardrum
What will ear infections do?
Fluid in small bones disturb the transfer of sound waves from the outer ear to the inner ear
What will head injuries do?
It will affect the auditory nerve
What is a transducer?
Something that changes sound waves into electrical signals or vice versa
What does a microphone consist of?
A diaphragm, coil, and a magnet
How does a mic work?
Sound waves hit the diaphragm which causes it to vibrate. It will produce an electrical signal which will then be amplified and sent to a loudspeaker
What does a loudspeaker consist of?
A cone, magnet, and a coil
How does a speaker work?
The electrical signal makes the cone vibrate, which makes the air molecules vibrate
