Science 4
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8.1 How is Sound Produced
8.1 How is Sound Produced
8.1.1 Sound is produced by Vibrating Objects
8.2 Intensity of Sound
8.3 Medium for Sound to Travel
8.3 Medium for Sound to Travel
8.3.1 Sound Cannot travel through Vacuum
8.3.2 Noise
8.4 Effect of Noise on Human Health
8.5 Measures to Reduce Noise Pollution
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