Introduction: Beijing Xinquansheng Technology Co., Ltd. was established on September 1, 1999. The headquarters of Beijing Xinquansheng Technology Co., Ltd. is located in Haidian District, Beijing. The company is wholeheartedly dedicated to services such as technology development, technology promotion, technology transfer, technical consultation, technical services, sales of mechanical equipment, goods import and export, technology import and export, and import and export agency. The company is a limited liability company (wholly-owned by a legal person).
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 research at home and abroad for many years and possess rich theoretical and practical experience. GZ DP Anechoic T&E Co., Ltd. has an office building and a factory. An acoustic laboratory that meets the CNAS standards has been built in the factory of GZ DP Anechoic T&E Co., Ltd. which can monitor the acoustic technical indicators of the products of GZ DP Anechoic T&E Co., Ltd. and provide external acoustic testing services. Through the hard work and continuous innovation and development of the DP team, the acoustic laboratories designed, produced and installed by it feature precise technical indicators, being environmentally friendly, durable in quality, good-looking in appearance and high in technological content.
The semi-anechoic chamber is not only a special laboratory for acoustic testing but also an important part within the testing system. In fact, it is also one type of the acoustic testing equipment, and the acoustic performance indicators of the semi-anechoic chamber directly affect the testing accuracy. For the specific acoustic design, manufacturing, construction, installation and brief introduction of on-site actual measurement and acceptance and other follow-up materials, 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 materials, please go to the download center on the official website of our company to download them for free.
Keywords: anechoic chamber, soundproof room, reverberation chamber, semi-anechoic chamber, fully anechoic chamber, 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 Level of Noise Sources - Precision Methods for Anechoic Chambers and Fully Anechoic Chambers" 2.ISO 3745 "Acoustics - Determination of Sound Power Level of Noise Sources - Precision Methods for Anechoic Chambers and Fully Anechoic Chambers"
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, cutoff 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 external ambient noise: Len (A) ≤ 65 dB (A), there is no interference from abnormal low-frequency noise sources (such as ground pounding, piling, impacts) around and the air conditioning and ventilation system is closed, the background noise Lgn(A) in the semi-anechoic chamber shall be ≤ 10 dB (A); Cutoff frequency: Fc ≤ 100 Hz.
IV. Measurement and Acceptance
Background when outdoor sound is not simulated
Background when outdoor noise is simulated
V. Completion Photos
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