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Module 38: Basic acoustic terminology for building services – CIBSE Journal
Calculation of NR & NC Curves in the optimus sound level meter and the NoiseTools software
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NR - the Noise Rating Curve
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dBA weighting filter frequency to dBA and dBC dB(A) and dB(C) A weighted sound calculate DIN IEC 651 calculator equal-loudness contours - sengpielaudio Sengpiel Berlin
Sound Levels - The Andrews Group
Noise Criterion (NC) - Free Online Calculator
Construction of rating curve at high water level considering rainfall effect in a tidal river - ScienceDirect