The point selection strategy for factory noise detection is very important to ensure that comprehensive and accurate noise data is obtained. The location of the points should be able to reflect the noise conditions of the entire factory, including the main noise sources and the affected work areas. The following are the point selection principles that are usually considered when testing factory noise:

Near the noise source: First, set up detection points around each major noise source (such as machines, compressors, fans, generators, etc.) to evaluate the noise level directly generated by these sources.

Working area: Set up detection points in areas where workers often stay or work, especially those areas where workers without fixed work positions may be exposed, such as assembly lines, warehouses or workshops.

Sensitive areas: Set up detection points in non-industrial areas such as offices, rest areas, canteens, etc., which may be affected by industrial noise.

Boundaries or factory boundaries: Set up detection points at the factory boundaries to evaluate the noise impact on the external environment, which is usually required to comply with local environmental regulations.

Entrances and exits: Set up detection points at the main entrances and exits of the factory, especially if there is traffic noise or noise generated by mechanical equipment entering and exiting these areas.

Height differences: Given the propagation characteristics of sound at different heights, it may be necessary to set up test points at different heights, especially in factories with elevated platforms or multi-story buildings.

Wind direction and obstacles: Given the impact of wind direction and physical obstacles in the factory (such as buildings and walls) on noise propagation, these factors should be considered when selecting test points.

Time factors: Test at different time periods (such as daytime, nighttime or specific operating hours) because noise levels may change over time and factory operations.

Historical data: If the factory has historical noise data, additional test points can be added in areas where previous test results show high noise.

Compliance check: Ensure that the test points cover all areas that may need to comply with specific environmental or occupational health and safety standards.

In actual operation, the selection of test points should follow relevant national standards or industry guidelines, such as the guidance on noise monitoring in ISO 14001 environmental management system. In addition, professional noise detection equipment should be used and operated by trained professionals to ensure the accuracy and reliability of the data.