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YOU SITE:Sound Barriers Series>>Shutter perforated noise barrier

Shutter peforated noise barrier (sound insulation board) acoustic technical indicators: 1, sound attenuation (insertion loss) of the viaduct speed is in commonly 80 km/h, m on the side of the street noise, between 80-85 db (A) residents affected by the noise of the impact point is generally between 68-75 db (A). Therefore, after the completion of the sound barrier insertion loss for more than 10 db (A). 2, sound insulation board in the average absorption coefficient and sound insulation quantity A, sound insulation board average sound absorption coefficient of a 0.5 or higher; All of the noise barrier absorption coefficient of acoustic components. A 0.90 or higher. The average sound absorption coefficient of A = a1s1 + a2s2 +... The a1, a2... ., for sound absorption part of sound barrier, the sound absorption coefficient of the reflection part and the other part, s1, s2,... For the area of the corresponding parts. B sound insulation of sound absorption, sound insulation board components quantity delta L acuity 30 db (A); Reflecting the sound insulation of transparent film delta L 32 db (A) or higher. C, acoustic components of filling the bulk density of porous materials for 48 kg/m3.

  

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