The installation method of the sensor (i.e., noise sensor) for an online environmental noise detector should be selected based on the actual application environment and national standards to ensure the authenticity and representativeness of the measurement data. The following are installation standards for key locations:
1. General installation specifications
Avoid interference signals: Prevent access to strong noise or vibration sources such as equipment rooms, traffic intersections, and high-power equipment (such as variable frequency speed regulators and electric motors).
Prevent vertical surfaces: Keep a distance of about 1 meter from walls, windows, and roadway vertical surfaces. For outdoor testing, it is recommended to maintain a relative height of about 1.2 meters above the ground.
Safeguarding the natural environment: To prevent exposure to sunlight and rainwater erosion, protective covers or waterproof enclosures (such as IP54 or above) should be used for outdoor assembly.
Assembly reliability: The sensor should be installed horizontally, maintaining perpendicularity to the plane, to minimize the impact of structural vibration.
2. Actual installation specifications for different scenarios
Construction site of engineering projects
Installed on the borderline, approximately 1.2 meters above the ground; when necessary, multiple layers of buildings can be placed to expand the detection range.
Highway traffic environmental noise detection
At least 3.5 meters away from all reflective surfaces (excluding the road surface), with a relative height of approximately 1.2 meters.
Noise detection at the boundary of manufacturing enterprises
The measuring point should be established at a noise-sensitive location within 1 meter of the factory boundary and at a relative height of 1.2 meters or above; if there is a courtyard wall at the factory boundary, the measuring point should be higher than the courtyard wall.
Urban built-up area/park and square natural environment noise detection
Located approximately 1 meter from the exterior wall of the building, at a relative height of 1.2–1.5 meters; a sensor equipped with a fan is used to reduce the impact of wind noise.
In-room detection (such as in corporate offices, classrooms)
The installation height should be approximately 1.2–1.5 meters (at ear height), avoiding areas affected by air currents or sound sources such as central air conditioning, windows, and doors.
Flammable and explosive materials in natural environments (such as chemical enterprises and mining operations)
The online environmental noise detector should utilize explosion-proof noise sensors and ensure compatibility with the explosion level of the assembly area.