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The greater the density, the
greater the material noise effect is better, brick, concrete,
cement, the actual construction of the housing must be
materials. The firm is the main materials of the supporting and
reinforcing function, their sound insulation ability is very
strong, but because they are very hard, but will play the role
of solid vibration transmission. Hollow bricks are better than
solid ones. Gypsum board is the most inner layer of housing, but
also a large number of interior decoration materials.
Note: all kinds of ordinary foam materials. Absolutely can not
be used as insulation materials, they have a world of difference
and polyester fiber sound-absorbing cotton or cotton insulation.
Ordinary foam, although good insulation box shockproof ability,
but the sound insulation ability is poor, they are hard and
light, is a very good acoustic material
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