Maximum Permitted Sound Level dBA | Measured Across and Outside (Property Line) |
55 | QMUDD |
60 | QLID, QWD |
65 | QGID, QAD |
Note: Notwithstanding these performance standards, aviation related activities are subject to FAA requirements and guidance. |
Type of Operation or Character of Noise | Correction in Decibels (dB) |
Noise source operates less than 20 percent of any one-hour period | Plus 5* |
Noise source operates less than 5 percent of any one-hour period | Plus 10* |
Noise sound operates less than 1 percent of any one-hour period | Plus 15* |
Noise of impulsive character (hammering) or periodic character (screech, hum etc.) | Minus 5 |
Note: Notwithstanding these performance standards, aviation related activities are subject to FAA requirements and guidance. | |
* Apply one of these corrections only. |
Residential ** Character of Vibration | Adjacent Lot Line | QGID, QAD District Boundary | QMUDD, QLID, QWD District Boundary |
Steady State | 0.10 | 0.50 | 0.20 |
Impact | 0.20 | 0.10 | 0.40 |
Note: Notwithstanding these performance standards, aviation related activities are subject to FAA requirements and guidance. ** Between the hours of 7 p.m. and 7 a.m., all of the permissible vibration levels indicated in the previous table for residential district boundaries shall be reduced by 50% |
880 R.I. Code R. 880-RICR-00-00-4.9