DELTA Acoustics & Vibrations
Århus - Danemark

Test facilities for walls

Transmitting room dimensions:
lenght 4.85 m width 6.15 m height 4.00 m
Receiving room dimensions:
lenght 5.00 m width 3.94 m height 3.15 m
Trasmitting room volume:  118 m3
Receiving room volume:  62 m3
Test opening dimensions:
width 4.22 m height 2.59 m
Border of the niche
to fix the specimens in:		 CONCRETE
Noise generator: BROAD BAND
Loudspeakers positions: MOVING
Microphones type: ROTATING
Diffusing elements:  area 13.2 m2
Number of microphones
positions: 		 1
Number of source positions:  1


Maximum achievable Sound Reduction Index (Rmax):

100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 Hz
51.1 54 58.7 62.4 68.2 73.5 77.9 82.1 85.2 87 88.9 90 92 93 93 94     dB

Rwmax = 78 dB

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