| Perambur (C) | ||
| Months | Day | Night |
| Standard Limit in Leq dB(A) | 65 | 55 |
| January | 60 | 50 |
| Febraury | 61 | 53 |
| March | 63 | 53 |
| April | 64 | 52 |
| May | 62 | 51 |
| June | 63 | 53 |
| July | 60 | 51 |
| August | 59 | 51 |
| September | 59 | 55 |
| October | 59 | 53 |
| November | 58 | 50 |
| December | 74 | 71 |
| All Values are measured in Leq dB(A) | ||
| I= Industrial, C= Commercial, R= Residential, S= Silence | ||