PURPOSE:

To verify that the sound of room meets the limited criteria in Vietnamese standards QCVN 24:2016/BYT.

• This test should be performed by trained or certified personnel.
• Specify the location of noise test.
• Measuring at least 3 positions in space should measure. Select the point at the wall angle or position seat work.
• The measuring at the wall angle must be 0.5 m away from all surrounding surfaces and no openings close to 0.5m
• Other positions have placed at positions away from the wall, the floor, the ceiling at least 0.5 m and at least 1 m from the main sound transmission areas such as windows, the air grill.
• The distance between the measurement points should be at least 0.7m
• Measure the sound of the room in dB by using a calibrated sound meter.
• Record the details of all test data.

ACCEPTANCE CRITERIA: