66 Micromate Operator Manual – 721U0201 Revision 6
A- and C-frequency weightings from 20-20000 Hz
LN1 and LN2: The Sound Level Microphone allows the setting of statistical noise levels, also called
exceedance levels, expressed as percentages.
Statistical noise levels are useful parameters when sampling fluctuating noise, showing what
samples are above specific levels. The Micromate Sound Level Microphone lets the user set two
different statistical noise levels, LN1 and LN2. LN1 and LN2 values are percentages, meaning that if
LN1 is set to 10%, a line will be drawn across the resulting graph at the level where 10% of the
samples exceed the value of the line.
The value of LN1 must be lower than the LN2 value, and be between 1-98%.
Sound Level Microphone LN1 Sound Level Microphone LN1 Threshold
set to 10%
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