Professional Sound Insulation and Absorption Material Manufacturer
Location: Sound insulation and Noise reduction, environmental material,Live a healthy life and enjoy yourselfMission: Sound-insulated noise reduction,environmental material, Create a healthy and environmentally friendly ecosystem. Vision: Become a trusted enterprise of Soundproof and Noise reduction.
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Ten Years of Industry
We need to consider that kindergartens are mostly children. When choosing sound ...
Normal people can hear voices with frequencies ranging from 20 to 20,000 hertz a...
The effect of noise on hearing: 50% of people who live in an environment above 8...
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