Sound

Question 1

Describe the properties of sound waves

Answer 1

The wavelength of a sound wave indicates the distance that wave travels before it repeats itself

Question 2

Type of sound wave

Answer 2

Longitudinal wave

Question 3

Define compressions

Answer 3

· The compressions represent areas of high density

Question 4

Define rarefaction

Answer 4

· The rarefactions represent areas of low density

Question 5

Define wave length

Answer 5

The distance from the start of one compression to the start of the next compression (or from the start of one rarefaction to the start of the next).

Question 6

Define frequency

Answer 6

• The number of waves passing a given point per second (measured in Hertz (Hz))
  
  • 1 Hz is equal to 1 wave per second

Question 7

Define amplitude in sound

Answer 7

A measure of how compressed or rarefied a medium becomes

A high amplitude indicates a high-intensity sound (i.e. louder)

Question 8

Define pitch

Answer 8

The rate at which the vibration are produces

Question 9

Define outer ear

Answer 9

• Acts as a funnel to sound waves
• The soundwaves travel through the ear canal and hits the eardrum causing it to vibrate
  The vibrations then enter the middle ear

Question 10

Define middle ear

Answer 10

• Contains the 3 smallest bones in the body
  • Hammer, anvil and stirrup
  The vibrations travel through the 3 bones and are transmitted to a liquid-filled inner ear

Question 11

Define inner ear

Answer 11

• Contain the cochlea
• Cochlea is snail shaped
  • Contains liquid and hundreds of cell attached to nerve fibers
  The nerve fibers form one larger nerve that travels to the brain where they are interpreted as sound