Answer: Sound insulation is well done and totally enclosed, which has little impact on the fourth floor; The sound insulation is not done well, which really affects sleep
Sound insulation material refers to a kind of material, component or structure that can block the sound transmission or weaken the transmitted sound energy, and is characterized by large mass and high density, such as steel plate, lead plate, concrete wall and brick wall. Generally used in offices or KTV.
Extension:
Sound insulation means shielding sound energy with sound insulation structures such as sound insulation windows, doors, screens, sound insulation rooms, sound insulation sheets, sound insulation walls and light composite structures. , thus reducing the harm of noise and sound radiation. It can be used indoors and outdoors, such as sound insulation screens on both sides of light rail and expressway, sound insulation screens in workshops, sound insulation doors in buildings, etc.
Sound insulation material Sound insulation material refers to a material that can weaken or block the propagation of sound waves. The sound insulation performance is expressed by the decibel difference between the incident sound energy and the transmitted sound energy of the material. The greater the difference, the better the sound insulation performance.
For a building space, if its enclosure structure vibrates under the action of external sound field or is directly impacted by objects, it will radiate acoustic energy to the building space, so the sound outside the space will be transmitted to the building space through the enclosure structure, which is called "sound transmission".
The incoming sound energy is always less than the external sound or impact energy, so the enclosure structure isolates a part of the sound energy acting on it, which is called "sound insulation". Sound transmission and sound insulation are just a phenomenon, and a pair of complementary concepts are obtained from two different angles.
If the enclosure structure isolates the sound energy of the sound field in the external space, it is called "air sound insulation"; If the acoustic energy radiated by the impact energy to the building space decreases, it is called "solid sound or impact sound isolation".
This is different from the concept of vibration isolation. The former is the air sound that finally reaches the receiver, and the latter is the solid vibration that the receiver feels. However, taking vibration isolation measures to reduce the impact of vibration or impact sources on closed structures (such as floors) can reduce the impact sound itself.
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