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The scope of noise detection for rail transit includes: building air sound insulation, floor impact sound insulation, reverberation time, environmental noise, industrial enterprise noise, industrial enterprise boundary noise, residential indoor noise, rail transit, passenger cars, cars, ships, and other noise detection Air Sound Insulation Testing Standards: GB/T 19889.4-2005 Acoustics - Measurement of Sound Insulation in Buildings and Building Components * Part 4: Field Measurement of Air Sound Insulation between Rooms GB/T 19889.5-2006 Acoustics - Measurement of Sound Insulation in Buildings and Building Components * Part 5: Field Measurement of Air Sound Insulation in Exterior Wall Components and Exterior Walls GB/T 50121-2005 Building Sound Insulation Evaluation Standards Rail Transit Noise Testing Standards: GB/T 3450-2006 Noise Limits and Measurement Methods for Railway Locomotives and Multiple Unit Cabins GB/T 12816-2006 Railway Passenger Car Interior Noise Limits and Measurement Methods GB 14892-2006 Urban Rail Transit Train Noise Limits and Measurement Methods STI can be used to measure speech intelligibility in various electronic systems and acoustic environments. Typical applications include: a) measuring public address system PA and sound reinforcement system B) Measurement and identification of voice alarm system VA and emergency notification system C) Measurement and identification of communication circuits (systems), such as internal communication and wireless communication systems D) Measure the speech intelligibility of rooms and halls (natural sound or using sound reinforcement systems) e) Evaluate direct verbal communication (without the use of sound reinforcement systems), including rooms and various acoustic environments f) Evaluate speech intelligibility of hearing assistance systems 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 problems100% inspection 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
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