The Noise Criteria option software allows the DSP analyzers to
analyze room environments and to compare the sound spectrum to
official Noise Criteria Standards. Results in the NC range of
63Hz to 8kHz are compared to the standard NC curves. This
comparison is displayed along with the octave frequency
information. Noise Criteria Frequencies: 63, 125, 250, 500, 1000,
2000, 4000 & 8000Hz. Option Kit Contains: An upgraded EPROM device and
software upgrade. NOTE: This option requires that OPT CVO or CVOW be
installed.