6.2 Interference of sound

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

This lesson contains 26 slides, with interactive quizzes, text slides and 1 video.

Items in this lesson

27 March 2023
Unit 6.3 Interference of sound

Slide 1 - Slide

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 2 - Slide

Slide 3 - Video

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

Slide 4 - Slide

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

Slide 5 - Slide


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 - Quiz


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
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1:00

Slide 10 - Slide

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 - Quiz


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

Slide 14 - Quiz


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

Slide 15 - Quiz

Application 

Slide 16 - Slide

Application 

Slide 17 - Slide

27 March 2023
Unit 6.3 Interference of sound

Slide 18 - Slide

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

Slide 19 - Slide

Slide 20 - Link

Slide 21 - Slide


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

Slide 22 - Open question

Application 

Slide 23 - Slide

Plenary (Sharing)

Slide 24 - Slide

  •  Answer questions found on page 221 of your learner's book.
  • Use your science notebook for your answers.
  • Turn your work in by the end of the period.
Activity
timer
1:00

Slide 25 - Slide

What's next?
Check the weekly reminders

Slide 26 - Slide