Norsonic uses the term Function to denote the combination of RMS (or Peak) detection with certain time constant and certain spectral Weighting networks involving measurement duration whenever relevant.
To form a function you combine a data type with a time constant; Fast, Slow or Impulse and a spectral Weighting networks (A, C, Z), octave or third octave band frequency analysis.
Statistical functions can also be selected here.
The function list will adapt to the selection you make for Network, Time Constant and Statistics.
The functions are based on the following data types:
The instantaneous Sound Pressure Level |
|
|---|---|
The Maximum Sound Pressure Level time weighted |
|
The Minimum Sound Pressure Level time weighted |
|
The Integrated Averaged SPL |
|
The Sound Exposure Level |
|
The Maximum Peak Level |
|
Statistical functions |
Time and frequency weighted sound levels for data types SPL, Lmax and Lmin
Frequency weighting Time weighting + data type |
A-Weighted |
C-Weighted |
Z-Weighted |
|---|---|---|---|
F SPL |
LAFspl |
LCFspl |
LZFspl |
S SPL |
LASspl |
LCSspl |
LZSspl |
I SPL |
LAIspl |
LCIspl |
LZIspl |
F Max |
LAFmax |
LCFmax |
LZFmax |
S Max |
LASmax |
LCSmax |
LZSmax |
I Max |
LAImax |
LCImax |
LZImax |
F Min |
LAFmin |
LCFmin |
LZFmin |
S Min |
LASmin |
LCSmin |
LZSmin |
I Min |
LAImin |
LCImin |
LZImin |
Time averaged sound levels
|
A-Weighted |
C-Weighted |
Z-Weighted |
|---|---|---|---|
Equivalent level (Leq) |
LAeq |
LCeq |
LZeq |
Exposure level (LE) |
LAE |
LCE |
LZE |
Filter functions
(Requires filter option installed in instrument)
|
Leq |
LE |
LFmax |
LFmin |
|---|---|---|---|---|
Selected filter 1/1Oct. or 1/3Oct. |
Lfeq |
LfE |
LfFmax |
LfFmin |
FFT
FFT requires instrument application version 5.0.1711 or newer. The FFT values will be saved along with global values, once per hour in NorCloud. When enabling FFT, you also can choose between high and low density, i.e., 2.92 and 1.46 Hz resolutions. This will appear under the Filter heading in the sound setup.
Please remember that some data require an extra action in addition to checking the tick box 
in order to be uploaded to NorCloud. These are marked with a cloud 
beside the tick box. If the cloud is light gray, data are not uploaded to NorCloud. If the cloud is blue, data is uploaded to NorCloud. Click on the cloud to toggle it.