Summary: Suzhou Huatongwei International Inspection Co., Ltd. was established on December 22, 2017. It is located in the National Nano University Science and Technology Park, No. 388 Ruoshui Road, Suzhou Industrial Park. Huatongwei is established and operates in strict accordance with the ISO/IEC 17025 specification. It has a full set of testing equipment for EMC, safety, radio frequency, reliability, biocompatibility, packaging verification, textile and leather, and has obtained the recognition of many domestic and foreign certification institutions such as CNAS, CMA, CNCA in China, UL, A2LA, FCC, Micom, CEC in the United States, TUV, EMCC, Phoenix in Germany, VCCI, C&S in Japan, DNV, NEMKO in Norway, INTERTEK in the UK, IC in Canada, EMSD in Hong Kong, and NBTC in Thailand. It is an IECEE CBTL of the International Electrotechnical Commission, and its test reports have international credibility.

GZ DP Anechoic T&E?Co., Ltd. is composed 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 building and factory, and an acoustic laboratory meeting the CNAS standards has been built in the factory, which can monitor the acoustic technology indicators of its own products and provide external acoustic testing services. The semi-anechoic chamber 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.For simple introductions to the specific acoustic design, manufacturing, construction, installation, on-site actual measurement and acceptance of anechoic chambers, soundproof chambers, silent chambers, reverberation chambers, semi-anechoic chambers, semi-soundproof chambers, fully anechoic chambers and fully soundproof chambers, please pay attention to browsing the project cases on the official website of our company, or scan the QR code of the WeChat public service account of our company to get free push notifications.For detailed information on anechoic chambers, soundproof chambers, silent chambers, reverberation chambers, semi-anechoic chambers, semi-soundproof chambers, fully anechoic chambers and fully soundproof chambers, please go to the download center on the official website belonging to our company to download for free.

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I.?Purchased Content

Semi-anechoic chamber

II. Standards Followed

1. GB/T 6882 "Acoustics - Determination of sound power levels of noise sources - Precision methods for anechoic and hemi-anechoic chambers"

2. ISO 3745 "Acoustics - Determination of sound power levels of noise sources - Precision methods for anechoic and hemi-anechoic chambers"

III. Project Contents and Main Indicators

1. The effective net internal dimensions of the semi-anechoic chamber installation project: 6500 mm × 6500 mm × 4300 mm, with an accuracy of +/- 100 mm;

2. When the external environment is in normal operation and there is no abnormal interference around (such as ground pounding, piling, impacts), the background noise Lgn(A) ≤ 13.5 dB(A), and the cut-off frequency: Fc ≤ 80 Hz.

IV. Metrological Acceptance

V. On-site Photos

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