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Data Analysis for XL2 Analyzer


The XL2 stores all data and audio onto the SD card for direct transfer to the computer. Audio data is stored as .wav files. Data reports and log files are stored in plain text format, which can be opened with any text editor (Notepad, Wordpad, etc). The data is tab-delimited, so dropping the .txt file into a spreadsheet application will conveniently show the results in columns.

Furthermore a series of free MS Excel application templates provide a convenient way to view the measurement results of specific tasks and create simple reports.

For the most comprehensive analysis of logged noise monitoring data, use the XL2 Data Explorer software. The data import into the software is enabled by the Data Explorer Option, which needs to be installed in the XL2 Sound Level Meter.

XL2 Data Explorer

XL2 Data Explorer is a PC-based software application with a powerful data processor for easy and fast analysis of sound level measurement data. Visualize, analyze and control millions of data points with this tool that is dedicated to acoustic consultants and noise measurement professionals. It provides a convenient way to view and manage your data and quickly create customized reports.


Introduction to XL2 Data Explorer


Chart View

The chart view shows the logged levels, markers, audio player, spectrogram and frequency spectrum.

Select Multiple Levels

A drop down menu allows you to select the individual levels. All selected noise levels are displayed in the chart. Select one or more, or a range of one-third octave bands for display against time.

Zoom and Pan

Extremely fast zoom and pan response over the entire data log period, even for very large data sets.


Mark areas of interest in the graph with a text description. Choose "Include Markers" for calculations of contributions by specific noise sources, enabling simple source ranking. Eliminate unwanted noise sources from your final result using "Exclude Markers". The marked areas are summed and appear in your report.

Level Statistics

XL2 Data Explorer offers a detailed statistical analysis of the logged sound level measure-ment data. The percentiles can be calculated for wide band levels as well as 1/1 and 1/3 octave band levels. Data Explorer calculates the level statistics of the complete measurement or marked time periods as part of the post-measurement analysis. Excluded periods are considered.

Result View

The tabular representation shows all results in a structured and intuitive way, detailing the original recorded results, summaries of the areas marked for exclusion and inclusion, and the final result. The results can be exported to EXCEL.

Audit Intervals

The noise level data is divided in measurement intervals with selectable length of 5, 10, 15, 30 or 60 minutes. The corresponding levels of these audit intervals are calculated and presented in the chart and result view.


Audio recordings are time-aligned to the graphs. Listen to the recordings for a more objective analysis of the noise sources with manual or automatic gain control.


Complete your professional reports with customized titles and comments. The XL2 Data Explorer automatically adds relevant header data such as the measurement date, calibration information, instrument setup etc., and compiles a tailored report. Simply add your own company logo.


The XL2 Data Explorer calculates the levels Lden, Ldn, Lday, Levening, Lnight with individual weightings (penalties).


Technical Overview


> Data Analysis

NoiseScout - Unattended Monitoring


Function Comparison

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