Environment Conservation Act, 1989 (Act No. 73 of 1989)RegulationsNoise Control6. Use of measuring instruments |
| 1) | The measurement of dBA values in respect of controlled areas, ambient sound levels or noise levels in terms of these Regulations shall be done as follows: |
| a) | Outdoor measurements on a piece of land: By placing the microphone of an integrating impulse sound level meter at least 1,2 metres, but not more than 1,4 metres, above the ground and at least 3,5 metres away from walls, buildings or other sound reflecting surfaces; and |
| b) | indoor measurements in a room or enclosed space, which is not ventilated mechanically: By placing the microphone of an integrating impulse sound level meter at least 1,2 metres, but not more than 1,4 metres, above the floor and at least 1,2 metres away from the wall, with all the windows and outer doors of the room or enclosed space entirely open: Provided that the windows and doors are closed for indoor measurements in rooms or enclosed spaces which are mechanically ventilated. |
| 2) | Any person taking readings, shall ensure that- |
| a) | the microphone of an integrating impulse sound level meter is at all times provided with a windshield; |
| b) | the measuring instruments are operated strictly in accordance with the manufacturer's instructions; and |
| c) | sound measuring instruments ale checked annually by the South African Bureau of Standards or a calibration laboratory approved by the Minister in order to comply with the appropriate specifications for accuracy. |