Filetype Power Point PPTX | Posted on 06 Sep 2022 | 4 years ago
Authentication
digital resources
246x Filetype PPTX File size 0.46 MB Source: www.edubuzz.org
Method
Equipment needed
• sound meter
• alarm
• air, bubble wrap
• foam, cotton wool, foam rubber
Equipment
Foam Cotton
Foam rubber wool
Bubble wrap
Alarm
Sound meter
Method
1. Make a sound wave using the alarm clock
2. Use a sound meter( at the other end of the
room) to measure the sound in dB one at a
time.
3. Put the material over the sound meter and
measure the sound.
4. Record the results in a table.
Results
material Volume (dB)
air 70
Bubble wrap 60
foam 70
Cotton wool 40
Foam rubber 50
Results
80
70
60
50
dB
40 Volume (dB)
30
20
10
0
air Bubble wrap foam Cotton wool
Material
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