Q. The loudness level of some characteristic sounds.
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Solution:
The loudness level of some characteristic sounds.
| Source of sound | Loudness level in decibels | Sensation of sound |
|---|---|---|
| 1. Rustling of tree leaves | 10 | Very very faint sound |
| 2. Whisper | 20 – 25 | Very faint sound |
| 3. Ordinary conversation | 40 – 60 | Normal loudness |
| 4. Telephone bell | 70 | Loud |
| 5. Heavy city traffic | 80 – 90 | Very loud |
| 6. Factory noise | 100 – 110 | Painfully loud |
| 7. DJ or amplified rock band | 120 | Painfully loud |
| 8. Take-off of a jet plane | 140 | Very painfully loud |
| 9. Rocket at take-off | 200 | Dangerously loud |
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