Research Article
A Case Study on Annoyance Noise Caused by Metro Railway at a TOD Developed Depot
Table 1
The summary of effects and threshold levels on healthy for
.
| Effect | Detailed effects | Threshold, dB (A) |
| Biological effects | EEG awakening | 35 | Motility, onset of motility | 32 | Changes in duration of various stages of sleep, in sleep structure and fragmentation of sleep | 35 |
| Sleep quality | Waking up in the night and/or too early in the morning | 42 |
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