Sound Flashcards
Auditory Nerve function
Electrical impulses travel along this to the brain, which interprets them as sound.
Oval window function
Vibrations pass from the middle ear into the inner ear through this part
Cochlea
This is a spiral-shaped tube filled with a fluid and tiny hairs that move in response to vibrations
Ossicles
These three tiny bones make the vibration of sound larger
Semicircular canal
These are filled with fluid and give us sense of balance
Eardrum
Sound travels along the ear canal and makes this flap of tough skin vibrate
How do we hear things
Our ear drums vibrate and this is transferred to nerve cells in our inner ear, then transmit a nerve impulse to our brain.
What is sound?
Sounds travels through pressure waves in a fluid.
What is amplitude
Is how far a particle in a wave vibrates from its central point
What is frequency?
Is how many waves pass a spot in one second.
How fast does sound travel?
343 m per second in air, 1440m in water and 5000m along steel.
What is the range of frequencies the human ear can detect?
From 20hz to 20,000hz
What is the frequency of sound when speaking?
600-4800hz
Symptoms of someone with Tinnitus
Stress, anxiety, problems communicating and makes hearing higher frequency sound more difficult.
Reduce risks at a work place
Wear ear protection
Check machines are regularly maintained
Replace old machines
