Transcript 5f - Changing Sound

Unit 5F: Changing sound
Unit 4F: Simple circuits: L.O. 1, 2: N.C. 4.1a
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?
Unit 5F: Changing sound
Unit 5F: Vocabulary
Some useful words
Pitch
How high or low a sound appears to be
Loudness
How loud or quiet a sound is
Vibration
A to-and-fro motion. Sound is made by vibrations
Muffle
To make a sound quieter
Tuning
To make an instrument sound as it should
Tension
How tight a string is
High
A high is ‘squeaky’ like a mouse
Low
A low sound is ‘booming’ like a bass drum
Unit 5F: Vocabulary
Unit 5F: How are sounds made?
How are sounds made?
How does each object make a sound?
Unit 5F: How are sounds made: L.O. 1, 2, 3: N.C. 4.3e
Unit 5F: Sound travelling
Sound travelling
Unit 5F: Sound travelling: L.O. 4: N.C.
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
Unit 5F: Which material does sound travel through best: L.O. 5, 6: N.C. 4.3g
Unit 5F: Why stopping sound is important
Why stopping sound is important
Unit 5F: Why stopping sound is important: L.O. 6: N.C
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?
Unit 5F: Sound insulation: L.O. 7, 8, 9, 10, 11: N.C. Sc.1
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
Unit 5F: Sound insulation: L.O. 7, 8, 9, 10, 11: N.C. Sc.1
Unit 5F: Pitch
Pitch
High pitch note
Low pitch note
Unit 5F: Pitch: L.O. 12: N.C. 4.3f
Unit 5F: Changing pitch and loudness of sounds
Changing pitch and loudness of sounds
Unit 5F: Changing pitch and loudness of sounds: L.O. 13, 14, 15: N.C. 4.3f
Unit 5F: Guitars
Guitars
How is the pitch changed on the guitar?
Unit 5F: Guitars: L.O. 16, 17: N.C. 4.3f
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
Unit 5F: Changing the pitch of an elastic band: L.O. 16, 17: N.C. 4.3f
Unit 5F: Other vibrations
Other vibrations
What is vibrating to make the sound?
Unit 5F: Other vibrations: L.O. 18, 19: N.C. 4.3e, 4.3f
Unit 5F: Changing the length of the air column
Changing the length of the air column
Unit 5F: Changing the length of the air column: L.O. 20, 21: N.C. 4.3e, 4.3f
Unit 5F: Summary
Concept map
High
Size
Made by vibrations
Low
Tightness of skin
Travel through air
Loud – hit hard
Soft – hit less hard
Stringed
Instrument
Length
Thickness
Changing
sounds
Pitch
High – small
column
Soft – plucked
less hard
Wood
Pipes
Tightness
Loud –
plucked hard
Water
Low – long
column
Soft floors
Ear plugs
Loud – blow harder
Soft furniture
Soft – blow less hard
Unit 5F: Summary: L.O. 22, 23: N.C. 3e, 3f, 3g