Testing standards:
GB/T 3241-1998 Octave and Fractional Octave Band Filters (eqv IEC 1260:1995) GB/T 3767-1996 Acoustics, Determination of Sound Power Levels of Noise Sources by the Sound Pressure Method, Engineering Method for Approximate Free Fields Above the Reflecting Surface (eqv ISO 3744; 1994> GB/T 3785-1983 Electrical and acoustic performance and testing methods of sound level meters GB/T 3947-1996 Acoustics Terminology GB/T 4129-1995 Acoustics - Determination of sound power levels of noise sources - Performance requirements and calibration of standard sound sources (eqv ISO 6926:1990) GB/T 6882-1986 Acoustics - Determination of sound power levels of noise sources - Precision methods for anechoic and semi anechoic rooms (neq ISO 3745:1977) GB/T 15173-1994 Sound calibrators (eqv IEC 942:1988) GB/T17181-1997 Integrated Average Sound Level Meter (idt IEC 804:1985) GB/T 17248.2-1999 Acoustics, Noise emitted by machinery and equipment: Measurement of emission sound pressure levels at working positions and other designated positions - Engineering method for an approximate free field above a reflecting surface (eqv ISO 11201: 1995) GB/T 17248.4-1998 Acoustics, Noise emitted by machinery and equipment - Determination of emission sound pressure levels at working positions and other designated positions (eqv ISO 11203:1995) ISO 3741:1999 Acoustics - Determination of noise source power levels using sound pressure method - Precision method for reverberation rooms ISO 9295; 1988 Acoustics - Measurement of high-frequency noise emitted by computers and office equipment - ISO 9296:1988 Acoustics - Labeling of noise values emitted by computers and office equipment - ISO 10302:1996 Acoustics - Measurement of airborne noise from small exhaust devices - ECMA TR/27:1995 Method for predicting equipment noise 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