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Acoustic Insulation of Sandwich Panels

Acoustic Insulation of Sandwich Panels

Acoustic Insulation of Sandwich Panels

The desired parameters and calculation methods for the acoustic insulation of roof and facade cladding materials can be determined at the design stage.
      A portion of the acoustic wave striking a surface is reflected, some are absorbed, and the rest is transmitted. Reflection, absorption, and transmission rates depend on the surface's shape, the material's sound absorption coefficient, and the sound's frequency.

FREQUENCY DEPENDENT VARIATION OF ACOUSTIC ATTENUATION (dB)               

Frequency (Hz)
  125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000
50 mm. 7,3 9,3 11,7 8,5 11,4 12,3 13,3 14,1 14,7 15,9 15,3 11,5 11,8 23,4 29,2 32,4 29,8 32,5 36,9
60 mm. 8,1 22,1 14,2 14,5 13,0 13,9 13,8 14,6 15,3 16,0 15,3 13,0 18,3 24,2 29,2 32,5 29,8 32,5 36,9

 

FREQUENCY DEPENDENT VARIATION OF SOUND ABSORPTION COEFFICIENT (dB) 

Frequency (Hz)
  315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000
50 mm. 0,08 0,11 0,22 0,2 0,05 0,59 0,09 0,11 0,04 0,07             

0,18

            
0,07
60 mm. 0,14 0,21 0,25 0,25 0,06 0,69 0,12 0,12 0,22 0,08 0,2 0,11