Lesson 6 — 5.3 Detecting sounds

Period 2
Sound
1 / 18
next
Slide 1: Slide
Natuurkunde / ScheikundeMiddelbare schoolhavo, vwoLeerjaar 2

This lesson contains 18 slides, with text slides and 1 video.

Items in this lesson

Period 2
Sound

Slide 1 - Slide

This lesson
  • Recap
  • Loudness and the decibel-scale
  • Frequency, wavelength and amplitude
  •  Working independently

Slide 2 - Slide

Learning goals
  •  Name the unit of loudness
  • Explain how the decibel scale works
  • Describe 3 ways to reduce the risk of loud sounds


Slide 3 - Slide

Recap

What did we cover previous lesson?

Slide 4 - Slide

Slide 5 - Slide

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

Slide 6 - Slide

Slide 7 - Slide

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

Slide 8 - Slide

A simulation

Slide 9 - Slide

The 
decibel-scale

Slide 10 - Slide

The decibel-scale
  • The unit of Loudness: decibel (dB)
  • its a relative scale

  • every 10 dB increases the intensity 10 times
  • For example:

Slide 11 - Slide

The decibel-scale
Every 10 dB increases the intensity 10 times

For example:
  • A 40 db sounds is 10 times louder as 30 db sound.
  • A 50 db sounds is 100 times louder as a 30 db sound (10 x 10)
  • A 60 db sound is 1000 times louder as a 30 db sound (10 x 10 x 10)

Slide 12 - Slide

Frequency, amplitude
& wavelength

Watch the video, write down what is meant by:
  • Frequency
  • Amplitude
  • Wavelength

Slide 13 - Slide

Slide 14 - Video

What is meant by...
  • Amplitude
  • Frequency
  • Wavelength

Slide 15 - Slide

A simulation

Slide 16 - Slide

Working independently
Read: 5.3
Read 5.4

Do: yellow block exercises 5.3
Do: Workbook exercises 5.3

Slide 17 - Slide

Learning goals
  •  Name the unit of loudness
  • Explain how the decibel scale works
  • Describe 3 ways to reduce the risk of loud sounds


Slide 18 - Slide