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JuNeng New Energy’s “Silent Workshop”: How Acoustic Engineering Is Reshaping the Human–Machine–Environment in Manufacturing Facilities
time：2026-08-05
On the second phase production line of the new energy PACK factory, an abnormal phenomenon attracted the attention of visitors: Dozens of laser welding equipment operated at the same time, but operators did not need to wear earmuffs and talked without raising the volume. This is not because the equipment is shut down, but the precise intervention of acoustic engineering-the noise is eliminated layer by layer before reaching the human ear. Behind this "silent revolution" is the deep thinking of "humanism" of manufacturing industry by gathering energy and new energy.
I. Noise trap: neglected industrial occupational disease
the noise source of power battery PACK factory is complex and dense.
The plasma burst of laser welding produces high-frequency howling, and the peak value can reach 95dB; The low-frequency roar of vacuum pump and air compressor continues, like the background noise; The running sound of AGV, the alarm sound of equipment, the exhaust sound of Pneumatic Components is interwoven to form the "acoustic pollution" of the industrial environment ".
Long-term exposure to environments above 85dB will lead to irreversible hearing impairment. Even in the "safety interval" of 75-85dB, continuous noise will cause fatigue, decreased attention and communication barriers. "We have done employee research, 60% of production line workers said that there was still tinnitus after work, and 40% thought that noise affected the communication efficiency with colleagues. "According to the director of new energy,"This is not only a health problem, but also a quality hazard-distracted operation may lead to deviation of welding parameters. "
II. Source noise reduction: Let the equipment learn to be "quiet"
the acoustic engineering of gathering energy and new energy resources follows the three-level prevention and control system of "source-propagation-reception", and source noise reduction is the most priority link.
Transformation of laser welding "silencer" it is a technical highlight. The new energy source and equipment manufacturers jointly developed the low noise welded connection, which reduced the plasma burst sound from 95dB to 82dB by optimizing the injection angle and speed of the air flow. The welding cabin adopts the design of partial sealing + negative pressure suction, and the noise is blocked at the point of generation. What is more ingenious is that the bulkhead is lined with micro-perforation acoustic panel absorber, and noise of a specific frequency forms resonance consumption in the perforation, just like acoustic "black hole".
"Sound insulation cover" of vacuum pump and air compressor" it is system engineering. Energy gathering new energy has customized sound insulation cover for each high noise equipment, the outer layer is 1.5mm galvanized steel plate, the inner layer is 50mm glass wool + non-woven composite sound absorption layer, and the sound insulation capacity is more than 25dB. The cover body is reserved for the inlet and exhaust muffler to ensure that the heat dissipation of the equipment is not affected. Vibration transmission is double blocked by rubber anti-vibration pad and spring shock absorber to avoid "solid sound transmission".
"Mute" of pneumatic system" equally particular. The exhaust noise of the traditional pneumatic valve is sharp and harsh. The new energy source is completely replaced by the silencer exhaust valve, and the exhaust noise drops from 85dB to 65dB. The flow velocity optimization of the compressed air pipeline eliminates the pipe vibration noise caused by turbulence.
III. Transmission blocking: Space magic of Architectural acoustics
once noise is generated, blocking its propagation path is the second line of defense.
The workshop layout of energy gathering new energy follows the principle of "noise partition. The high noise welding area and machining area are physically isolated from the low noise assembly area and detection area, with double-layer glass sound insulation window + Sound absorption corridor in the middle. The sound absorber in the suspended space at the top of the workshop adopts flame retardant centrifugal glass wool, and the sound absorption coefficient reaches 0.9 in the frequency band above 500Hz, effectively absorbing medium and high frequency noise.
Ground design also hidden mystery. The new energy source adopts floating floor structure in the welding area-laying rubber anti-vibration pad on the reinforced concrete floor, and then pouring fine stone concrete surface layer. This "sandwich" structure decouples the vibration of equipment from the main body of the building to avoid noise spreading to the whole plant through the ground.
ventilation system. The air conditioning air supply outlet and return outlet are equipped with muffler, and the inner wall of the air duct is attached with sound absorption felt to ensure that the airflow noise does not overlap with the equipment noise. The fresh air volume is designed according to 30m & sup3;/h per capita, which not only meets the comfort level, but also avoids the extra noise caused by excessive ventilation.
IV. Receiving protection: the last kilometer of "human ear care"
even if the source and transmission links are extreme, individual stations still need individual protection.
The solution of gathering energy and new energy is not simply "hair earmuffs", but "intelligent hearing protection system". The noise monitor above the station displays the current sound pressure level in real time, and automatically reminds you to wear noise reduction headphones when it exceeds 80dB. Headphones are not the traditional passive sound insulation type, but the active noise reduction type-they collect environmental noise through microphones to generate reverse sound wave cancellation. While protecting hearing, they allow the voice frequency to pass without affecting the communication between colleagues.
The more humanized design is "silent rest cabin". The corner of the workshop is equipped with acoustic isolation rest cabin, and the internal sound pressure level is controlled below 45dB, which is equivalent to the library environment. Workers can in the rest in a 15-minute workshop to completely recover the hearing system from industrial noise. The cabin is equipped with a white noise generator to simulate the sound of rain or streams to help relax quickly.
energy gathering new energy the "silent workshop" exceeds the bottom line requirements of career health code.
"Regulations require no more than 85dB of workplace noise, and our internally controlled standard is 75dB. "The director of EHS explained," This is not a waste of costs, but investment-compensation for hearing impairment, recruitment costs for staff turnover, quality loss caused by noise, far exceeding noise reduction investment. "
the data shows that after the second production line was put into operation, the active turnover rate of employees in this region decreased by 40%, and the one-time qualified rate of welding process increased by 2.3%. What is more difficult to quantify but equally important is that workers repeatedly mentioned "the feeling of being respected" in interviews-when enterprises are willing to invest real money in their auditory comfort, the sense of belonging will naturally grow.
In the context of manufacturing industry, "humanism" is often misunderstood as canteen dishes or group building activities. The practice of "silent workshop", which gathers energy and new energy, redefines it as the engineering respect for the working environment-replacing rough earmuff protection with acoustic precision calculation, eliminating it with space design rather than tolerating noise, use technical input to convey care for workers.
Contact us
Dongguan Juneng New Energy Technology Co., Ltd.
137 5142 6524（Miss Gao）
susiegao@power-ing.com
Xinghuiyuan High tech Industrial Park, Dalang Town, Dongguan City, Guangdong Province
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