Unit 5F: Changing sound

1. Unit 5F: Changing sound Unit 4F: Simple circuits: L.O. 1, 2: N.C. 4.1a

2. 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

3. 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 Unit 5F: Vocabulary

4. 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

5. Unit 5F: Sound travelling Sound travelling Unit 5F: Sound travelling: L.O. 4: N.C.

6. 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

7. Unit 5F: Why stopping sound is important Why stopping sound is important Unit 5F: Why stopping sound is important: L.O. 6: N.C

8. 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

9. 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

10. Unit 5F: Pitch Pitch High pitch note Low pitch note Unit 5F: Pitch: L.O. 12: N.C. 4.3f

11. 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

12. Unit 5F: Guitars Guitars How is the pitch changed on the guitar? Unit 5F: Guitars: L.O. 16, 17: N.C. 4.3f

13. 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

14. 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

15. 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

16. High Made by vibrations Size Low Pitch Sound Tightness of skin Travel through air Pitch Loud – hit hard Drum Loudness Soft – hit less hard Changing sounds Water Stringed Instrument Length Wood Good Thickness Pitch Pipes Tightness Sound travelling through materials High – small column Loudness Soft floors Loud – plucked hard Wind instruments Low – long column Bad Pitch Ear plugs Soft – plucked less hard Loud – blow harder Loudness Soft furniture Soft – blow less hard Unit 5F: Summary Concept map Unit 5F: Summary: L.O. 22, 23: N.C. 3e, 3f, 3g