| Perambur (C) | ||
| Months | Day | Night |
| Standard Limit in Leq dB(A) | 65 | 55 |
| January | 63 | 57 |
| Febraury | 62 | 55 |
| March | 61 | 54 |
| April | 58 | 52 |
| May | 61 | 54 |
| June | 61 | 52 |
| July | 60 | 51 |
| August | 59 | 49 |
| September | 58 | 46 |
| October | 58 | 47 |
| November | 59 | 54 |
| December | 52 | 43 |
| All Values are measured in Leq dB(A) | ||
| I= Industrial, C= Commercial, R= Residential, S= Silence | ||