Unit 3E: Magnets and Springs

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Unit 5F Changing sound
Changing Sound How do each of the
instruments make a sound? What is the sound like
from each one? Why do dogs and cats move their
ears?
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Unit 5F Vocabulary

• Some useful words
• Pitch
• Loudness
• Vibration
• Muffle
• Tuning
• Tension
• High
• Low

How high or low a sound appears to be
How loud or quiet a sound is
A to-and-fro motion. Sound is made by vibrations
To make a sound quieter
To make an instrument sound as it should
How tight a string is
A high is squeaky like a mouse
A low sound is booming like a bass drum
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Unit 5F How are sounds made?

• How are sounds made?
• How does each object make a sound?

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Unit 5F Sound travelling

• Sound travelling

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Unit 5F Which materials does sound travel
through best

• Which materials does sound travel through best
• What material is the best to stop the sound
  travelling from the alarm?
• Try various materials in the box to see which is
  the best for the sound to travel through and
  which is the best at keeping the sound in

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Unit 5F Why stopping sound is important

• Why stopping sound is important

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Unit 5F Sound insulation

• Sound insulation
• In this investigation you are going to plan a
  test to measure or observe how well different
  materials muffle sound for use in ear protectors.
• The materials you have available are
• - Bubble wrap
• - Towelling
• - Foam sheeting
• - Blanket material
• Which material do you think will be the best and
  why do you think this?

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Unit 5F Sound insulation

• How will you make fair comparisons of whether
  the sound is muffled or not?
• What sound source will you use?
• What will you vary and how will you ensure that
  the results you record are reliable and fair?
• How will you record these results?
• When you have completed the investigation decide
  if you could have changed anything to make your
  investigation better. Do you think there is a
  better way of deciding whether the sound was
  muffled or not? Do some research to see if there
  are any instruments that can be used to measure
  sound levels

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Unit 5F Pitch

• Pitch

High pitch note Low pitch note
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Unit 5F Changing pitch and loudness of sounds

• Changing pitch and loudness of sounds

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Unit 5F Guitars

• Guitars
• How is the pitch changed on the guitar?

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Unit 5F Changing the pitch of an elastic band

• Changing the pitch of an elastic band
• How can you change the pitch of each string?
• Describe how this can be done and then test if
  you are correct, report your findings

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Unit 5F Other vibrations

• Other vibrations
• What is vibrating to make the sound?

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Unit 5F Changing the length of the air column

• Changing the length of the air column

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Unit 5F Summary

• Concept map

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