Sound

Question 1

Auditory Nerve function

Answer 1

Electrical impulses travel along this to the brain, which interprets them as sound.

Question 2

Oval window function

Answer 2

Vibrations pass from the middle ear into the inner ear through this part

Question 3

Cochlea

Answer 3

This is a spiral-shaped tube filled with a fluid and tiny hairs that move in response to vibrations

Question 4

Ossicles

Answer 4

These three tiny bones make the vibration of sound larger

Question 5

Semicircular canal

Answer 5

These are filled with fluid and give us sense of balance

Question 6

Eardrum

Answer 6

Sound travels along the ear canal and makes this flap of tough skin vibrate

Question 7

How do we hear things

Answer 7

Our ear drums vibrate and this is transferred to nerve cells in our inner ear, then transmit a nerve impulse to our brain.

Question 8

What is sound?

Answer 8

Sounds travels through pressure waves in a fluid.

Question 9

What is amplitude

Answer 9

Is how far a particle in a wave vibrates from its central point

Question 10

What is frequency?

Answer 10

Is how many waves pass a spot in one second.

Question 11

How fast does sound travel?

Answer 11

343 m per second in air, 1440m in water and 5000m along steel.

Question 12

What is the range of frequencies the human ear can detect?

Answer 12

From 20hz to 20,000hz

Question 13

What is the frequency of sound when speaking?

Answer 13

600-4800hz

Question 14

Symptoms of someone with Tinnitus

Answer 14

Stress, anxiety, problems communicating and makes hearing higher frequency sound more difficult.

Question 15

Reduce risks at a work place

Answer 15

Wear ear protection
Check machines are regularly maintained
Replace old machines

Question 16

What is intensity measured by?

Answer 16

Decibels