# 6.2 Interference of sound

27 March 2023
Unit 6.3 Interference of sound
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Slide 1: Tekstslide
PhysicsSecondary EducationAge 12,13

In deze les zitten 26 slides, met interactieve quizzen, tekstslides en 1 video.

## Onderdelen in deze les

27 March 2023
Unit 6.3 Interference of sound

#### Slide 1 -Tekstslide

Content objectives
• describe how sound waves reinforce
• state what happens to a sound when sound waves reinforce
• explain how sound waves cancel
• describe what happens to the loudness of a sound when sound waves cancel

#### Slide 3 -Video

• shape of the graph of a sound
From memory:
timer
1:00
peak
trough

#### Slide 4 -Tekstslide

• Answer the given questions related to interference.
• Discuss by comparing with the person next to you your answers.
Prior Knowledge Check
timer
1:00

#### Slide 5 -Tekstslide

Which is the synonym for the word "interfere"?
prevent
allow
decrease
increase

#### Slide 6 -Poll

Sound waves produce interference when they meet each other.
A
True
B
False

#### Slide 7 -Quizvraag

Interference can happen if the waves are of the same type.
I agree.
I disagree.

#### Slide 8 -Poll

Sound waves CAN interfere with water waves.
I agree.
I disagree.

#### Slide 9 -Poll

What happens when two sound waves of the same frequency and amplitude interfere with each other?
Key Question 1
timer
1:00

#### Slide 11 -Link

Interference can produce TWO effects: the waves can reinforce or the waves can cancel each other.
I agree.
I disagree.

#### Slide 12 -Poll

When two sound waves, the amplitude of the sound waves increases.
Does the sound become louder?
A
Yes
B
No
C
Maybe

#### Slide 13 -Quizvraag

When two sound waves, the amplitude of the sound waves increases.
Does the pitch become higher?
A
Yes
B
No
C
Maybe

#### Slide 14 -Quizvraag

When two sound waves, the amplitude of the sound waves increases.
Does the frequency become increase?
A
Yes
B
No
C
Maybe

Application

Application

#### Slide 17 -Tekstslide

27 March 2023
Unit 6.3 Interference of sound

#### Slide 18 -Tekstslide

Would you hear a sound when the peaks and troughs of two similar sound waves meet together?
Key Question 2
timer
1:00

#### Slide 21 -Tekstslide

What two conditions must two waves have to interfere effectively with each other?

Application

#### Slide 23 -Tekstslide

Plenary (Sharing)

#### Slide 24 -Tekstslide

•  Answer questions found on page 221 of your learner's book.