Zhejiang Jindun Fan Co., Ltd. Introduction to the acoustic design, manufacturing, construction and installation of semi-absorbing chambers and on-site inspection and acceptance

Zhejiang Jindun Fan Co., Ltd. was founded in 2005. It is a national high-tech enterprise specializing in the research, development, production and sales of ventilation system equipment in the fields of subway, tunnel, nuclear power, military industry, etc. After more than ten years of rapid development, the company's total assets exceed 2 billion yuan, and it has become a research and development manufacturer of high-end equipment and systems for military-civilian integration with diversified product structure.

Guangzhou Danpin Artificial Environment Technology Co., Ltd. is composed of a team of acoustic experts and professional engineers who have been engaged in research on various acoustic technology for many years at home and abroad and have rich theoretical and practical experience. It has its own office building and factory. The factory has an acoustic laboratory that meets CNAS standards, which can monitor the acoustic technical indicators of its own products and conduct external acoustic testing services. The semi-absorbing chamber is not only a special laboratory for acoustic testing, but also an important part of the test system. In fact, it is also one of the acoustic testing equipment, and its acoustic performance indicators directly affect the accuracy of the test. For follow-up information such as silencer room, silence room, reverb room, semi-silencer room, semi-silencer room, full silencer room, full silencer room, and a brief introduction to the specific acoustic design, manufacturing construction and installation, and on-site actual test and acceptance, please pay attention to browsing the engineering cases in our official website, or scan the QR code of our WeChat public service account for free to push. For detailed information on silencer room, silencer room, reverb room, semi-silencer room, full silencer room, and full silencer room, please go to the download center of our official website for free to download.

Keywords: silence room, silence room, reverb room, semi-silence room, semi-silence room, full silence room, full silence room.

1. Procurement content

1. Precision-level semi-silence room

2. Acoustic performance test of fans of any size with diameter D≤1m

2. According to standards

1. GB/T 6882 "Precision method for determining acoustic power level of acoustic noise source"

2. ISO3745 "Acoustic-Determination of Acoustic Power Levels of Noise Source-Precise Determination Method of Ablative Chamber and Full Ablative Chamber"

3. JJF1147 "Calibration Specifications for Acoustic Characteristics of Absolute Room and Absolute Room"

4. GB 50034-2004 "Architectural Lighting Design Standards"

Project content and main indicators

1) The effective net size inside the semi-silence chamber installation project: 4000m×3000mm×2800mm, and the effective sizes outside after production are: 5600mm×4600mm×3600mm;

2) The semi-silence chamber installation project is equipped with 4 professional echo-free and noise-free lighting fixtures, three walls are installed with sockets and extended accordingly to the concave interior of Danpin sound-absorbing and sound-silencing tips;

3) Personnel passage door size: W×H=2.0×2.4 (m);

4) The use of sound absorption and silence in the semi-sound chamber is sized: 600*600*500mm; when the external environment is working normally, there is no abnormal interference around (such as ground smashing, pile driving, impact), the noise floor Lgn(A) ≤25dB(A), cutoff frequency: Fc≤100Hz.