Aerospace Life-Support Industries, Ltd. was established in 2003 and is located in Xiangyang City, Hubei Province. It is an enterprise mainly engaged in professional technical services. The company has more than 10 subsidiaries, with regional distribution in Hubei, Anhui, Shanghai, Sichuan and other places. Its business scope includes personal protective and life-saving equipment, emergency life-saving devices, ejection power devices, parachutes, special air conditioners, oxygen supply and ground testing equipment, sensitive components, aviation sports products and so on. Aerospace Life-Support Industries, Ltd. was rated as one of the top 100 high-tech enterprises in Hubei Province in 2022.
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 possess rich theoretical and practical experience. It owns its own office building and factory. 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. Through the arduous efforts, continuous innovation and development of the Danpin team, the acoustic laboratories designed, produced and installed by it feature precise technical indicators, environmental friendliness, durability, nice appearance and high technological content.
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 details such as specific acoustic design, manufacturing, construction, installation, and brief introduction to on-site actual measurement and acceptance, please pay attention to browsing the engineering 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 materials, please go to the download center on the official website of our company to download them for free.
Keywords: anechoic chambers, soundproof chambers, silent chambers, reverberation chambers, semi-anechoic chambers, semi-soundproof chambers, fully anechoic chambers, fully soundproof chambers, acoustic measuring instruments, vibration measuring instruments.
I. Procurement Content
1. Semi-anechoic chamber.
II. Basis of Standards
1. GB/T 6882 "Acoustics - Determination of sound power levels of noise sources - Precision methods for anechoic and hemi-anechoic rooms"
2. ISO 3745 "Acoustics - Determination of sound power levels of noise sources - Precision methods for anechoic and hemi-anechoic rooms"
III. Main Indicators and Project Content
1. The installation project construction plan and the materials used for the semi-anechoic chamber shall all be designed and installed by 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 ambient environmental noise: Len(A) ≤ 75 dB(A), there is no interference from abnormal low-frequency noise sources (such as ground pounding, pile driving, impacts) around and the air conditioning and ventilation system is turned off, the background noise Lgn(A) in the semi-anechoic chamber shall be ≤ 25 dB(A); when the air conditioning system is turned on, the background noise: Lgn(A) ≤ 30 dB(A); cut-off frequency: Fc ≤ 80 Hz.
IV. Measurement and Acceptance
Background noise when the air conditioner is turned on.
Background noise when the air conditioner is turned off.
Acceptance Report
V. Completion Photos
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