Micromate Operator Manual – 721U0201 Revision 6 65
Response Time: For Sound Level Microphones, choose between Fast and Slow response times. The
Fast setting gives an average time weighting of 125mS, which is best for capturing sounds and
sound peaks that occur quickly. The Slow setting gives an average time weighting of 1 second,
which is best for consistent sound levels, or to average levels that change quickly.
Sound Level Microphone Response Time set to Fast
Frequency Weighting: For Sound Level Microphones, choose between A-weighting and C-
weighting.
Sound Level Microphone Frequency Weighting set to A
Frequency weightings are electronic filters that adjust the way the Sound Level Microphone
measures noise. The Micromate Sound Level Microphone gives you the choice between A-
weighting and C-weighting. Both weightings cover the full frequency range of 20 Hz to 20 kHz. A-
weighting approximates the frequency sensitivity of the human ear. C-weighting is commonly used
for higher level measurements and Peak Sound Pressure levels. The following graph illustrates A-
and C-weightings across the frequency range 20-20000 Hz.
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