| Perambur (C) | ||
| Months | Day | Night |
| Standard Limit in Leq dB(A) | 65 | 55 |
| January | 79 | 79 |
| Febraury | 80 | 79 |
| March | 74 | 71 |
| April | 62 | 56 |
| May | 60 | 49 |
| June | 60 | 52 |
| July | 60 | 51 |
| August | 67 | 65 |
| September | 63 | 56 |
| October | 64 | 58 |
| November | 70 | 68 |
| December | 65 | 63 |
| All Values are measured in Leq dB(A) | ||
| I= Industrial, C= Commercial, R= Residential, S= Silence | ||