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Anonymous users2024-01-24Floating floor slabs are much better.
At present, China has the following regulations on the design of sound insulation of residential panels:
1.Article GB-50096-1999 (2003 Edition) of the Code for Residential Design states that the weighted standardized impact sound level of the floor slab is less than or equal to 75dB (A).
2.Article 118-88 of the Code for Sound Insulation Design of Civil Buildings states that the weighted standardized impact sound level of the sub-household floor slab is 65 dB (A) for the first level and 75 dB (A) for the second level; In addition, when there are real difficulties, a standardized impact sound pressure level of 85 dB(A) can be allowed for the weighting of the three-level floor slab, but the possible conditions for improvement should be reserved in the floor construction.
3.The minimum standard of the Technical Regulations for the Construction of Healthy Homes CECS179:2005 is 75 dB(A).
The subjective evaluation of the standardized impact sound level of residential floor weighting by relevant domestic institutions has been obtained, and it is appropriate to take no more than 65 dB(A), and considering the specific technical and economic conditions, it is determined that no more than 75 dB(A) is the low limit.
However, at this stage, a large number of commercial residences provided to consumers in China's real estate market are designed according to the initial decoration standards, in which the floor layer is made of cement mortar screed layer on top of the reinforced concrete structure layer, and the weighted standardized impact sound level of the floor slab is basically about 80 dB (A). The surface layer selected by residents for secondary decoration is solid wood flooring, which can reach about 65dB (A), which can basically meet the design standards. If the surface material used is a hard material (granite, floor tiles, etc.), it can only be maintained at about 80 dB(A), which does not meet the design requirements.
In order to solve the interference problem of floor impact sound, according to the conditions of material construction and economy in China, it is advisable to use floating floor slab, that is, to lay an elastic cushion layer on the load-bearing floor slab, and make a fine stone reinforced concrete floor layer on it. The reinforced concrete floor layer works as a mass, and the elastic cushion is similar to a spring, forming a vibration isolation system. The greater the quality of the surface layer, the better the elasticity of the cushion layer, and the better the sound insulation.
At the same time, acoustic bridges should be prevented during construction.
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Anonymous users2024-01-23See if the cross-section is real wood, some of the surface is the same as real wood, but in fact, the inside is full.
And if there is a layer of tin foil behind the solid wood, don't buy it.
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