1 General Provisions
1.0.1 This code is formulated with view to preventing the noise hazard of industrial enterprises, guaranteeing the employees' health, ensuring the safety production and normal work, and protecting environment.
1.0.2 This code is applicable to the noise control design of the construction, renovation, extension and technical transformation engineering of industrial enterprises.
1.0.3 The noise control design of the construction, renovation and extension engineering of industrial enterprises shall be carried out in parallel with the engineering design.
1.0.4 The design of noise control of industrial enterprise shall cover comprehensive analysis on the production process, operating maintenance, noise reduction effect, and technical and economic efficiency.
1.0.5 As for the noise generated during production process and by equipment, control shall be carried out at the sound source at first by replacing the high noise process and equipment with the low noise process and equipment; if it still fails to meet the requirement, the noise control measures such as sound insulation, noise elimination, sound absorption, vibration isolation and integrated control shall be taken.
1.0.6 As for such workshops and workplaces that still fail to meet the design limit of noise control after being taken with corresponding noise control measures, proper personal protective measures shall be taken.
1.0.7 In addition to the requirements stipulated in this code, the design of noise control of industrial enterprises also shall comply with those in the current relevant standards of the nation.
2 Terms
2.0.1 Workplace
All working places controlled directly or indirectly by the employing unit and serving for occupational activities of laborers.
2.0.2 Impulsive noise
Noise having the characteristic of sudden increment of sound pressure, with duration not greater than 1s.
2.0.3 A-weighted sound pressure level
Sound pressure level measured by A-weighted network.
2.0.4 C-weighted sound pressure level
Sound pressure level measured by C-weighted network.
2.0.5 Octave band sound pressure level
Sound pressure level when the bandwidth is one octave, with reference sound pressure of 2×10-5 Pa.
2.0.6 Noise-sensitive buildings
Buildings where shall be kept quiet, like hospitals, schools, institutions, research units and dwelling houses, etc..
2.0.7 Noise-sensitive enterprise
Enterprises of which the internal work nature or service condition requires a quiet environment.
2.0.8 Equipment specified for noise control
Equipment designed, produced or manufactured specially for controlling noise.
2.0.9 High noise equipment
Equipment of which the radiated noise has obvious influence on the work environment or living environment.
2.0.10 Sound insulation
1 General Provisions
2 Terms
3 Design Limit of Noise Control of Industrial Enterprises
4 Noise Control in Overall Design of Industrial Enterprises
4.1 General Requirements
4.2 Site Selection
4.3 General Layout Design
4.4 Process, Pipeline Design and Equipment Selection
4.5 Workshop Layout
5 Sound Insulation Design
5.1 General Requirements
5.2 Sound Insulation Design Procedure and Method
5.3 Selection and Design of Sound Insulation Structure
6 Noise Elimination Design
6.1 General Requirements
6.2 Procedures and Methods of Noise Elimination Design
6.3 Selection and Design of Mufflers
7 Sound Absorption Design
7.1 General Requirements
7.2 Procedures and Methods of Sound Absorption Design
7.3 Selection and Design of Sound Absorption Members
8 Vibration Isolation and Noise Reduction Design
Explanation of Wording in This Code
List of Quoted Standards
