| Perambur (C) | ||
| Months | Day | Night |
| Standard Limit in Leq dB(A) | 65 | 55 |
| January | 71 | 63 |
| Febraury | 72 | 65 |
| March | 72 | 64 |
| April | 73 | 66 |
| May | 73 | 69 |
| June | 73 | 69 |
| July | 73 | 68 |
| August | 72 | 68 |
| September | 74 | 67 |
| October | 75 | 78 |
| November | 75 | 80 |
| December | 72 | 72 |
| All Values are measured in Leq dB(A) | ||
| I= Industrial, C= Commercial, R= Residential, S= Silence | ||