The Octave & Third-Octave Band Ln Calculation Module is an add-on for the NoiseTools software that allows for the calculation of Ln values, such as L10, L50 & L90, in 1:1 and 1:3 Octave Bands.
This allows, for example, L90 values in 1:3 octave bands from 100Hz to 5kHz to be calculated and used to assess the tonal content of a noise measurement.
Using time history data that has been downloaded from a suitable Optimus Red or Optimus Green Sound Level Meter, the module processes this information using the same statistical method used in the Optimus Green Sound Level Meters.
The module allows the calculations to be run on a pre-defined list of commonly used Ln values (L1, L5, L10, L50, L90, L95 & L99) and additional, user defined values can be added if required.
In addition, dB(A) or dB(C) can be applied to the calculations (the default configuration uses applies no frequency weighting to the calculations).
Alongside the calculated Ln values in each band, the module can also display the overall Leq for each frequency band as well as the value of the highest sample used within each frequency band.
In addition, the overall broadband Leq (A, C or Z weighted) and LFmax (A, C or Z weighted) values can be displayed for reference and comparison purposes.
The calculated values are displayed both in graphical and numerical form and a report can be produced.
The graphical and numerical data can be exported for use in other programs or applications as required.
The module allows a measurement report to be quickly generated which contains both the graphical and tabular data in a clear, straight forward layout.
This report can be saved, printed or exported in a range of formats, allowing it to be incorporated into other reports or documents quickly and easily.
The graphical display can be saved as an image and the tabular data exported as either a CSV or XML file for use in other applications.
The Octave & Third-Octave Band Ln Calculation Module can be ordered using the product code SWNR-LN.
For more information, please contact Cirrus Research or your local Cirrus Sales Partner.
As with all Cirrus sound level meter and doseBadge software, the standard version of the NoiseTools software is supplied free from any licensing restrictions and can be installed on as many PC's as is needed without the need to purchases any additional licenses, seats or keys.
Updates can be downloaded free of charge from the Cirrus website. Where access rights permit, NoiseTools can automatically download and installed updates when they become available.
Detailed installation information and guidance is available to help in the installation process. If NoiseTools is to be used in a networked environment or where data is to be shared between multiple users, NoiseTools can be setup to support these requirements.
Additional modules, such as the Octave & Third-Octave Band Ln Calculation Module, can be added to the standard program. Please note that there may be a charge for this additional modules. Please contact Cirrus Research plc or your local Cirrus Sales Partner for more information.