Xiamen Hongfa Electric Appliance Co., Ltd. was founded in 2001 and is mainly engaged in investment management and the production and operation of power and combined automotive relays.The equity of the company is entirely derived from the management technical backbone of Xiamen Hongfa Electric Sound Co., Ltd. and the backbone employees of the group enterprises of the company.The company holds a 20% equity in Xiamen Hongfa Electric Sound Co., Ltd. and has controlling stakes in Xiamen Hongmei Electronics Co., Ltd., Xiamen Jinghe Electrical Automation Co., Ltd., Xiamen Jinbo Precious Metal products Co., Ltd., Xiamen Jinyue Electrical Co., Ltd., and Ningbo Jinhai Electronics Co., Ltd.
The company is mainly dedicated to the research, development, production, and sales of power relays and automotive electronics. Its products are widely used in power relay protection, power control, industrial automation, white household appliances, automotive flashing, alarm, windshield wiper, delay, and other intelligent control systems. With the strong technical strength, advanced equipment level of Xiamen Hongfa Electric Sound Co., Ltd., and the experience accumulated in the research and development and manufacturing of relays over decades, the company has established a leading position in the industry within a few short years and has successively supplied products to customers such as Siemens, Delphi, SAIC, General Motors, and NARI.
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 index directly affects the test accuracy.For detailed information such as specific acoustic design, manufacturing construction and installation, and on - site actual measurement and acceptance, please visit the official website of the company for engineering cases, or scan the QR code of the public service account of the company for free push. The detailed materials can be downloaded for free from the download center on the official website of the company.
I. Procurement content
Semi-anechoic chamber
II. Basis standards
(1) GB/T 6882 "Acoustics - Determination of sound power level of noise sources - Precision method for anechoic and semi-anechoic chambers";
(2) ISO 3745 "Acoustics - Determination of sound power level of noise sources - Precision method for anechoic and semi-anechoic chambers".
III. Main indicators and project content** Acceptance criteria
1. The size and accuracy of the semi-anechoic chamber after construction meet the requirements of the contract agreed upon by both parties.
2. When there is no abnormal low-frequency noise source interference in the external environment, the background noise in the semi-anechoic chamber is Lgn(A)≤20 dB(A).
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