Tianjin Customs, directly under the leadership of the General Administration of Customs, is a department-level customs responsible for the operation management, supervision and monitoring of customs work within designated ports and related areas. Its jurisdiction covers all customs management work in Tianjin. The supervision categories of Tianjin Customs cover sea, land, air and postal services, with a supervision area of more than 11,000 square kilometers and a coastline of more than 100 kilometers. There are currently 21 internal institutions and 20 affiliated customs units. Its main responsibilities include: lawfully performing duties such as tax collection and administration, customs clearance supervision, bonded supervision, import and export statistics, customs audit, customs protection of intellectual property rights, combating smuggling, as well as inspection and quarantine and supervision and management in the jurisdiction.
They chose to cooperate with GZ DP Anechoic T&E Co., Ltd. to build an acoustics laboratory (anechoic chambers, semi-anechoic chambers, fully anechoic chambers, semi-anechoic laboratories, fully anechoic laboratories, soundproof chambers, semi-soundproof chambers, fully soundproof chambers, semi-soundproof laboratories, fully soundproof laboratories, reverberation chambers, semi-reverberation chambers, fully reverberation chambers, acoustics laboratories, noise chambers, sound insulation rooms, soundproof rooms, listening rooms, NVH laboratories, soundproof booths, soundproof rooms, silent rooms, airborne sound insulation rooms, impact sound insulation rooms). This is because GZ DP Anechoic T&E Co., Ltd. consists of a team of acoustic experts and professional engineers who have been engaged in various acoustic technology researches at home and abroad for many years and have rich theoretical and practical experience. It owns its own office buildings and factories, and there is an acoustics laboratory built in accordance with CNAS standards in the factory, which can monitor the acoustic technical indicators of its own products and provide external acoustic testing services. Through the hard work, continuous innovation and development of the DP team, the acoustics laboratories designed, produced and installed by them have products with accurate technical indicators, environmental friendliness, durability, beautiful appearance and high technological content.
The acoustics laboratory is not only a special laboratory for acoustic testing, but also an important part of the testing system. In fact, it is also one of the acoustic testing equipment, and its acoustic performance indicators directly affect the testing accuracy.Warm congratulations on the successful acceptance of the acoustics laboratory project of Tianjin Customs of the Republic of China (China for short) contracted by our company.Detailed materials can be downloaded for free from the download center on the official website of our company.
I. Procurement Content
Acoustics Laboratory
II. Basis Standards
(1) ISO 3745 "Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for anechoic and hemi-anechoic rooms"
(2) GB 6882 "Acoustics - Determination of sound power levels of noise sources - Precision methods for anechoic and hemi-anechoic rooms"
(3) GB 6675.2-2014 "Safety of toys - Part 2: Mechanical and physical properties"
(4) ISO 8124-1-2000 "International Toy Safety Standard"
(5) ASTM F 963-07 "American Toy Safety Standard"
(6) EN 71 "European Toy Safety Standard"
III. Main Indicators and Project Contents
1.Effective Space of Acoustics Laboratory
The indoor net dimensions and technical indicators of the acoustics laboratory after construction are calibrated by a third-party calibration institution to meet the requirements of the contract agreement between both parties.
IV. Final Actual Measurement
The measured background noise is: Lgn(A)≤17.5dB(A)
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