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Quiet Spaces
September-30th-2025
Impact noise (such as footsteps or objects falling): Vibrations generated by objects striking the floor or wall are transmitted through the building structure, making it a current challenge for residential soundproofing. Direct transmission: Vibrations travel through the floor, walls, ceiling, and indoor air, creating audible noise. Gaps in doors and windows: Poor sealing of sliding windows...
Industrial Noise Control: Characteristics, Hazards, and Solutions of Power Plant Noise
September-30th-2025
Sanyuan Environment has been deeply engaged in the field of acoustic environment management for nearly 20 years. By accurately identifying noise characteristics, scientifically assessing health risks, and innovatively applying noise reduction technologies, we provide a comprehensive solution for power plant noise management. Through customized design, the application of green materials, and...
September-30th-2025
Recently, the Noise Online Team of the company's Technology R&D Department proposed a "four-dimensional model" solution. This solution empowers the noise mapping system through the full chain of "perception, analysis, decision-making, and feedback," providing a replicable and scalable benchmark paradigm for urban sound environment management. Sanyuan Environmental has innovatively established...
September-30th-2025
Noise generated by charging equipment has become a growing concern among residents, impacting the quality of the urban acoustic environment and user experience. To balance the need for green travel with community livability, Sichuan Sanyuan Environment has proposed a "technology + management" noise reduction solution, encompassing source control, transmission blocking, and intelligent...
Precise noise reduction strategies for cooling towers and induced draft fans in industrial noise
September-30th-2025
Typical case: The noise level of a chemical plant's cooling towers reached 93dB(A), with a peak exceeding 100dB at 500Hz. The induced draft fan's sound pressure level at 250Hz reached 108dB, triggering complaints from residents 100 meters away. Variable frequency water droplet noise reduction technology: Converts free-falling water to thin-film flow (sprinkling noise down 12dB)...
September-30th-2025
Schematic diagram of the micro-perforated plates in different positions within the noise reduction device (1-micro-perforated plate; 6-acoustic black hole structure; 7-first limit mechanism; 8-speaker). Gree Electric's patented noise reduction technology, utilizing intelligent adjustment, an acoustic black hole structure, and active speaker noise reduction, opens up new avenues for physical...
September-30th-2025
I. Legal Methods and Technical Paths for Noise Control III. The Multidimensional Significance of Noise Control for the Country, Enterprises, and the People CATL has incorporated noise control into its ESG report, attracting international investors and reducing financing costs by 1.2%. Through the coordinated advancement of technology, policies, and public awareness, China is shifting from...
September-30th-2025
(3mm butyl rubber + 2mm aluminum plate) 100-800Hz noise attenuation 12dB. Three-way elastic support (X/Y/Z axis stiffness ratio 3:2:1) attenuates 63Hz vibration by 15dB. A Helmholtz resonance cavity (typical frequency 80-125Hz) is formed in the hoistway, amplifying the cabin...
Sound therapy regulates the sympathetic nervous system and helps overcome motion sickness
September-30th-2025
A research team led by Takumi Kagawa and Masashi Kato of the Graduate School of Medicine at Nagoya University has discovered that using a unique acoustic wave stimulation technology-a device that stimulates the inner ear with sounds of specific wavelengths-can...
Research on the noise reduction mechanism of sound barriers and their engineering applications
September-30th-2025
Porous structure: The material has interconnected microporous structures with a pore size range of 10-500μm. Suitable flow resistance: The material flow resistivity is within the range of 100-1000 Rayl to achieve the best sound absorption effect. Appropriate thickness: The thickness of the sound-absorbing material is related to the target noise reduction frequency, usually λ/4 (λ is...
September-30th-2025
The Ministry of Housing and Urban-Rural Development's "Code for Sound Insulation Design of Civil Buildings" (GB 50118-2010) clearly stipulates that the airborne sound insulation of exterior windows in school buildings must be ≥30dB, and special spaces such as language classrooms must be ≥35dB. Improving concentration: A key primary school in Shanghai installed ventilation and soundproof...
Research | Ultrasound technology creates private sound spaces
September-30th-2025
A Penn State University research team has come up with a new technique that uses ultrasound beams, which are inaudible to the human ear and can be generated using smaller hardware. Jiaxin Zhong, a postdoctoral scholar in acoustics at Penn State, used a dummy with microphones in its ears to measure the presence or absence of sound along the ultrasound trajectory. Zhong Jiaxin...
September-30th-2025
Gas-steam combined cycle power generation systems have numerous noise sources, characterized by high sound pressure levels, complex spectra, and concentrated distribution. These noise sources can be broadly categorized as follows: Piping systems: Regenerative noise generated by high-speed fluid (steam, gas) transport and valve throttling noise. Boiler exhaust silencing: The exhaust ports of...
Noise reduction measures in transformer room
September-30th-2025
Ventilation system: Design a reasonable ventilation system, avoid using noisy fans, and choose low-noise fans and air conditioners to reduce noise generated by equipment operation. Interior shape design: When designing the transformer room, consider the interior shape and the acoustic properties of the materials, and choose appropriate wall and ceiling shapes to reduce sound waves...
From "being able to hear" to "being able to control": How to create a new model of "quiet city"?
September-30th-2025
Joint law enforcement mechanism: Wuhan has established a "noise control task force," with data sharing among the environmental protection, urban management, public security, and housing and construction departments. This allows for multiple investigations into incidents like nighttime construction and public disturbances caused by square dancing. When monitoring networks become the "ears of...
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