Summary: Guangzhou Danpin Artificial Environment Technology 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 possess rich theoretical and practical experience. It owns its own office building and factory, and an acoustic laboratory that complies with the CNAS standards has been built in the factory, which can monitor the acoustic technical 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 follow-up materials such as brief introductions to the specific acoustic design, manufacturing, construction, installation and on-site actual measurement and acceptance of soundproof chambers, anechoic chambers, silent chambers, reverberation chambers, semi-soundproof chambers, semi-anechoic chambers, full-soundproof chambers and full-anechoic chloride, pay attention to browsing the project cases on the website of our firm, or scan the QR code of the WeChat public service account of our firm to get free push notifications. For detailed materials of the above-mentioned chambers, go to the download center on the website of our firm to download them for free.

Gree Electric Appliances Wuhan Industrial Park is the eighth global production base built by Gree Electric Appliances after Zhuhai, Chongqing, Hefei, Zhengzhou, Brazil, Pakistan and Vietnam. The project covers an area of 1,400 mu, with a total investment of over 3 billion yuan. It will be completed in three phases. After reaching full production capacity, it will achieve an annual output value of 3 billion yuan for commercial air conditioners, 6 million sets of household air conditioners, 6 million compressors and 20 million motors. Among them, some projects can be put into production in advance by the end of 2011. It is estimated that after the whole project is put into production in 2014, its annual output value will exceed 15 billion yuan.

Keywords: soundproof chamber, anechoic chamber, silent chamber, reverberation chamber, semi-soundproof chamber, semi-anechoic chamber, full-soundproof chamber, full-anechoic chamber.

I. Purchasing Content Semi-anechoic chamber

II. Basis of Standards

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

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

III. Project Content and Main Indicators

1. The design and installation of the construction plan and the materials used for the semi-anechoic chamber installation project shall be entirely the responsibility of Party B.

2. The effective net internal dimensions, cut-off frequency and free field radius of the semi-anechoic chamber installation project shall be implemented in accordance with the contract agreed upon by both parties.

3. When the working condition unit is shut down, the external environmental noise: Len (A) ≤ 75 dB (A), there is no abnormal low-frequency noise source interference around (such as ground pounding, piling, impact) and the air conditioning and ventilation system is closed, and only the lights are on, the background noise Lgn (A) in semi-anechoic chamber A ≤ 15 dB (A); the background noise Lgn (A) in semi-anechoic chamber B ≤ 15 dB (A);

when the working condition unit operates at the minimum air volume and there is no abnormal interference around (the background noise outside the partition wall outside the main body of the semi-anechoic chamber ≤ 75 dB), the background noise Lgn in semi-anechoic chambers A and B ≤ 18 dB (A).

IV. Measurement and Acceptance

V. Completion Photos

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