| Perambur (C) | ||
| Months | Day | Night |
| Standard Limit in Leq dB(A) | 65 | 55 |
| January | 56 | 52 |
| Febraury | 58 | 54 |
| March | 57 | 54 |
| April | 59 | 55 |
| May | 62 | 58 |
| June | 62 | 59 |
| July | 60 | 56 |
| August | 62 | 59 |
| September | 62 | 58 |
| October | 47 | 46 |
| November | 49 | 50 |
| December | 56 | 59 |
| All Values are measured in Leq dB(A) | ||
| I= Industrial, C= Commercial, R= Residential, S= Silence | ||