Lesson 5 — 5.2 Detecting sounds

• Natuurkunde / Scheikunde
• Middelbare school
• havo, vwo
• Leerjaar 2

Period 2

Sound

This lesson

• Recap
• Paragraph 5.2 — Detecting sounds
•  Working independently

Learning goals

• Name the three main parts of the ear and what their purpose is
  
•  Explain how a microphone turns a sound wave into an electric signal
•  Describe the four types of hearing loss

Recap

What did we cover previous lesson?

1)How is sound produced?

2) What is a medium?

3) Explain what is meant by 

• a) Compression
  
• b) rarefaction
  

4) Longitudinal waves, transverse waves

• a) How are they different?
• b) What do they have in common?

How is sound produced?

• Through a vibration

What is sound made off?

• Sound waves
  

How does sound travel over distance?

• Through a medium
  

Where do you the compression and rarefaction?

Where do you the compression and rarefaction?

Compression

Where do you the compression and rarefaction?

Compression

Rarefaction

A sound wave simulation

Link

Paragraph 5.2

Detecting sounds

Exercise

write down what the purpose is of:

• The Outer ear

• The Middle ear
  

• The Inner ear
  

Outer ear

• Collect sounds waves, channels them to the middle ear
  

Middle ear

•  Amplifies the sound waves

Inner ear

• Turns the wave pattern into an electric signal so that it can be send to the brain through nerves

Four types of hearing loss

•  A hole in your ear drum — this heals over time

•  Getting wax build up in your ear — this can be removed

• An ear infection, fluid builds up in your middle and inner ear.

• Your auditory nerve or system can get damaged or be fautly

Homework

Yellow block exercises 5.2

Workbook exercises 5.2

Learning goals

• Name the three main parts of the ear and what their purpose is
  
•  Explain how a microphone turns a sound wave into an electric signal
•  Describe the four types of hearing loss