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Ranges of sound intensity or loudness 1. Threshold of hearing - the quietest sound that can be heard under ideal condition is from 0 dB to 120 dB 2. Threshold of pain - sounds with intensities greater than 120 dB that can already cause pain and damage to ears in humans LEARNING TASK 2 Direction: Identify whether the following sound intensity is a Threshold of hearing or Threshold of pain Source Ranges of sound intensity or loudness 1. Jet engine at 10m 2. Office 3. Rustle of leaves 4. Car Horn 5. Vacuum Cleaner 6. Hospital 7. Library 8. Rock band 9. Conversation 10. Machine Shop Sound Intensity Level 150 dB 50 dB 10 dB 120 dB 80 dB 30 dB 40 dB 110dB 60 dB 100 dB
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