Delta Booth   Standard Features
Delta 142                                                             Delta 143
SOUND ABSORPTION
 Center Frequency 125 250 500 1000 2000 4000 NRC
Delta 142 & 143 0.79 1.08 1.10 1.02 1.04 1.00 1.05

NOISE REDUCTION
 Center Frequency 125 250 500 1000 2000 4000 8000
Delta 142 &143 27 37 44 53 58 60 62

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