1. Scope of Application: This standard specifies the emission limits and measurement methods for environmental noise at the boundary of industrial enterprises and fixed equipment factories. This standard is applicable to the management, evaluation, and control of noise emissions in industrial enterprises. Units that emit noise to the external environment, such as government agencies, public institutions, and organizations, shall also comply with this standard. 2 Normative References This standard refers to the following documents or their clauses. For undated references, their valid versions are applicable to this standard. GB 3096 Acoustic Environmental Quality Standard GB 3785 Electrical and Acoustic Performance and Test Methods for Sound Level Meters GB/T 3241 Octave and Fractional Octave Band Filters CB/T 15173 Acoustic Calibrators GB/T 15190 Technical Specification for Classification of Applicable Areas for Urban Environmental Noise GB/T 17181 Integrated Average Sound Level Meters 3 Terms and Definitions The following terms and definitions are applicable to this standard. 3.1 Industrial enterprise noise refers to the noise generated by the use of fixed equipment in industrial production activities that interferes with the surrounding living environment and is measured and controlled at the factory boundary. 3.2A sound level A-weighted sound pressure level is the sound pressure level measured using an A-weighted network, expressed in Lx and expressed in dB (A). 3.3 Equivalent continuous A-weighted sound pressure level, abbreviated as equivalent sound level, refers to the average energy value of A sound level within the specified measurement time T, represented by LAex, r (abbreviated as Lqq), in dB (A). Unless otherwise specified, the noise values in this standard are equivalent sound levels
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China