# 6.1 Loudness and pitch of sound

22 March 2023
Unit 6.1 Loudness and Pitch of a Sound
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Slide 1: Tekstslide
PhysicsSecondary EducationAge 12,13

In deze les zitten 37 slides, met interactieve quizzen, tekstslides en 6 videos.

## Onderdelen in deze les

22 March 2023
Unit 6.1 Loudness and Pitch of a Sound

#### Slide 1 -Tekstslide

Content objectives
• Describe what is meant by the amplitude of a sound
• Explain how the loudness of a sound depends on the amplitude of the sound wave
• Describe what is meant by the frequency of a sound wave
• Explain how the pitch of a sound depends on the frequency of the sound wave
• Recognise the changes in amplitude and frequency from a graph of the wave or an oscilloscope display

#### Slide 2 -Tekstslide

Would you hear a sound in outer space?
Key Question
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#### Slide 4 -Video

Which of these is common to all objects that make a sound?
A
They all have particles.
B
They are all in a vacuum.
C
They have particles that are compact.
D
They all carry light.

#### Slide 6 -Tekstslide

Sound is made when objects vibrate.
I agree.
I disagree.

#### Slide 9 -Tekstslide

Definition: Loudness
- a way to describe how quiet or loud a sound appears
Can you hear this?

#### Slide 11 -Video

• how much the object is vibrating
Loudness depends on...
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#### Slide 12 -Tekstslide

• how far away the vibrating object is
Loudness depends on...
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#### Slide 14 -Video

The movement of particles in the air is difficult to draw in a sound wave, but it is easier to draw in a graph.
I agree.
I disagree.

#### Slide 16 -Tekstslide

• shape of the graph of a sound
Waveform
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#### Slide 17 -Tekstslide

• shape of the graph of a sound
Waveform
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peak
trough

#### Slide 19 -Link

Which waveform shows a louder sound?

#### Slide 21 -Tekstslide

Which of the following is the name given to the equipment shown?
A
photometre
B
sound metre
C
oscilloscope
D
caleidoscope

#### Slide 22 -Quizvraag

What do you see in an oscilloscope?
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#### Slide 23 -Tekstslide

22 March 2023
Unit 6.1 Loudness and Pitch of a Sound

#### Slide 25 -Tekstslide

Which of these lengths of ruler causes a higher pitch of sound?
20 cm
10 cm

#### Slide 26 -Poll

Definition: Frequency
- the number of vibrations in each second (or per second)

#### Slide 30 -Tekstslide

Which waveform shows a higher pitch?

#### Slide 34 -Video

Group Task
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• Gather together as a team.
• Accomplish the given tasks.
• Present your output.

#### Slide 35 -Tekstslide

Plenary (Sharing)

#### Slide 36 -Tekstslide

What's next?
End of Unit 3 Assessment