Summary:
Chengdu Qihang System Integration Co., Ltd. is a national high-tech enterprise that integrates design, research and development, production, sales, and technical services. It is committed to providing integrated solutions for military reinforced electronic equipment carrier systems. Due to work requirements, it approached our company to build a semi-anechoic chamber to create an acoustic environment for improving its own working facilities and developing more advanced products. Chengdu Qihang System Integration Co., Ltd. closely follows the development trend in the international air-cooled heat dissipation field, benchmarks against international advanced and mature products, and is dedicated to providing domestic military fans and integrated solutions for reinforced electronic chassis for customers in different fields.The independently developed series of fan products of the enterprise, which possess independent intellectual property rights and meet general quality characteristics, are widely used in airborne, shipborne, vehicle-mounted platforms and special engineering equipment in both military and civilian fields. The development of these devices increasingly requires the support of an acoustic laboratory.
They chose to cooperate with Guangzhou Danpin Artificial Environment Technology Co., Ltd. because the latter 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 possess rich theoretical and practical experience. It owns its own office building and factory, and there is an acoustic laboratory that meets the CNAS standard in the factory, which can monitor the acoustic technical indicators of its own products and provide external acoustic testing services. Through the hard work and continuous innovation and development of the Danpin team, the acoustic laboratories designed, produced, and installed by it have products with accurate technical indicators, being environmentally friendly, durable in quality, beautiful 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 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 rooms, reverberation chambers, semi-soundproof chambers, semi-anechoic chambers, fully soundproof chambers, and fully anechoic chambers, please pay attention to browsing the project cases on the official website of our firm, or scan the QR code of the WeChat public service account of our enterprise to get free push notifications. For detailed materials of these chambers, please go to the download center on the official website of our company to download for free.
II. Procurement Content
Semi-reverberation-free chamber (semi-anechoic chamber)
III. Basis of Standards
(1) GB/T 6882 "Acoustics - Determination of Sound Power Level of Noise Sources - Precision Methods for Anechoic Rooms and Fully Anechoic Rooms";
(2) ISO 3745 "Acoustics - Determination of Sound Power Level of Noise Sources - Precision Methods for Anechoic Rooms and Fully Anechoic Rooms";
IV. Project Contents
(1) The construction plan and materials used for the semi-reverberation-free chamber installation project shall be designed and installed by Party B in full;
(2) The effective internal clear dimensions of the semi-reverberation-free chamber installation project: 5000mm × 4000mm × 2700mm, with an accuracy of: +/- 100mm.
V. Main Terms for the Acceptance of the Semi-reverberation-free Chamber Product:
(1) When the external environment is in normal working condition and there is no abnormal interference around (such as ground pounding, piling, impact), the background noise Lgn(A) ≤ 18dB(A);
(2) Cut-off frequency: Fc ≤ 100Hz.
