Читать книгу Sleep: The secret to sleeping well and waking refreshed - Prof. Idzikowski Chris - Страница 86
Noise table
Оглавление| Type of noise | Decibels (dB) |
|---|---|
| Faintest, audible sounds | 0.2-20 |
| TV sound studio, quiet library | 20-30 |
| Quiet office | 40-50 |
| Conversation | 50-60 |
| Primary school classroom, loud radio | 60-70 |
| Power drill | 85-90 |
| Road drill | 100-110 |
| Chainsaw | 110-115 |
| Jet aircraft taking off, 25 miles away | 140 |
