Sound

Question 1

How to keep your ears safe

Answer 1

Make sure when wearing headphones to keep sound to a sensible volume and do not stand directly near loudspeakers.

Question 2

Speed of sound vs. speed of light

Answer 2

The speed of light is faster than the speed of sound

Question 3

How does sound travel?

Answer 3

Sound travels in waves

Question 4

How do our ears hear sound

Answer 4

Sound waves travel through the air to our eardrum causing it to vibrate. These vibrations are then transmitted to tiny bones and fluid in our inner ear. The movement of this fluid stimulates nerve endings which carry messages to our brains that are interpreted as sound.

Question 5

What is amplitude? How does it look on a sound wave?

Answer 5

The amplitude of a wave is the distance from the center line (or the still position) to the top of a crest
The volume of a sound wave is shown by the amplitude.

Question 6

What is frequency? How does it look on a sound wave?

Answer 6

Frequency is how many wavelengths there are. The pitch of a sound is shown by frequency - closer together = higher pitch and further apart = lower pitch.