The Building Research Institute
Warsaw - Poland

Test facilities for walls

Transmitting room dimensions:
lenght 5 m width 6 m height 3 m Not rectangular
Receiving room dimensions:
lenght 6 m width 5 m height 3 m Not rectangular
Trasmitting room volume:  100 m3
Receiving room volume:  93 m3
Test opening dimensions:
width 4.2 m height 2.75 m
Border of the niche
to fix the specimens in:		 CONCRETE
Noise generator:  
Loudspeakers positions: FIXED
Microphones type: ROTATING
Diffusing elements:  
Number of microphones
positions: 		 1
Number of source positions:  2


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
44.5 44.4 52.1 54.8 56.1 60.4 63.8 67.6 73.4 75.6 77.8 79.5 79 75.6 75.6 71.7     dB

Rwmax = 68 dB

Press Here for the cross-sections and the geometry of the laboratory.

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