When sound waves hit the surface of the material, part acoustic energy is reflected, another part is sucked into the material, a division again through the other side of the material. When the majority of sound energy goes into the material (or sucked through) also reflected energy is small, the material demonstrates that features good sound absorption. When sound absorption coefficient above 0.2, can be called a sound-absorbing material.
Using a structural material or block the transmission of sound to create a quiet environment called soundproofing. When sound enters the material, the energy through the other side of the material is very small, suggesting that the material has good sound insulation. Decibel difference between sound energy and energy goes into sound on the other side through the main output of the soundproofing material.
From the above explanation, we can understand that: Sorbent focus small magnitude of sound energy reflectance, minimizing purpose sound energy reflectance. Sound insulation materials focused on the small magnitude of acoustic energy through the other side, the purpose of minimizing acoustic energy through.
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