| Perambur (C) | ||
| Months | Day | Night |
| Standard Limit in Leq dB(A) | 65 | 55 |
| January | 64 | 58 |
| Febraury | 76 | 75 |
| March | 65 | 64 |
| April | 61 | 59 |
| May | 66 | 65 |
| June | 73 | 79 |
| July | 65 | 65 |
| August | 66 | 63 |
| September | 63 | 60 |
| October | 71 | 67 |
| November | 63 | 58 |
| December | 69 | 63 |
| All Values are measured in Leq dB(A) | ||
| I= Industrial, C= Commercial, R= Residential, S= Silence | ||