User manual

32
Sound Level Meter
17
Measurement Unit
Select the measurement unit as follows:
dB Sound level in dBSPL
This measurement unit is permanently selected
when an NTi Audio measurement microphone
with electronic data sheet is connected.
dBu Input level in dBu
dBV Input level in dBV
V Input level in Volt
LOW - Indication
The low indicator for an individual level “<” is displayed when:
The measured sound pressure level is below the selected •
linear measurement range. In this case the results shown
are most likely higher than the actual sound pressure level ->
choose the next lower measurement range.
The measured sound pressure level is just above the residual •
noise of the connected NTi Audio measurement microphone.
This reduces the measurement accuracy -> choose another
microphone designed for low level measurements.
The low condition is registered in the log and report files in the
column “Low(eq/peak)“ individually for all frequency weight-
ings, the RMS and the peak levels.