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(materials) noise reduction, NR The difference in decibels between the average sound pressure levels produced in two rooms by a sound source in one of them.
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NQPS NQR NQR-DLME NQRC NQREIP NQS NQS NQSE NQSF NQSG NQSO NQSW NQT NQTG Nqthm NQTIE NQUA Nqueens NQV NQW NQWI NQWU NQY NQZ NQZC NR NR&DNR&DC NR&R NR- NR-KPP nr-PDB NR/KPP NR1 NR2 NR4A3 NRA NRA NRA NRA NRA NRA NRA ILA NRA PVF NRA-ILA NRAA NRAAC NRAAO NRAB Nrac NRACA NRAD NRADAN NRAE NRAEF | |||||
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