8 Files
8.1 The audio data file ”xxxxxxxx.wav” (e.g. 10160233.wav)
After completion of recording into internal RAM, the stored data is written as standard audio WAVE file onto the
inserted SD card with the file name ”xxxxxxxx.wav”. (e.g. 10160233.wav)
The first four digits identify the serial number of the BATLOGGER and the following four digits exhibit the
consecutive number of the recorded files on the inserted SD card.
The above example therefore identifies the 233
th
recording on this SD card of the BATLOGGER with the serial
number 1016.
The *.wav file contains all the uncompressed raw measurement values of the analog to digital converter and a
“header”, which is specific to the wave format. This “header” contains, amongst other information, the sampling rate
of the digitiser.
Concurrent with these recorded wave data, a file containing meta information about the recording (see below) is
saved to SD card with the name *.xml (in our example 10160233.xml).
The standard *.wav files can be read and opened with general audio software or bat specific sound analysis
programs. It may be displayed as time signal or spectrogram. The latter offers best possibilities to identify species.
Elekon AG offers a specific analysis software for Windows PCs: BatExplorer. It can be found on the included SD
card or can be downloaded from www.batlogger.ch.
WSL offers BatScope, a Mac software tool for management and preview of recorded data, which will eventually be
extended to bat species identification: see http://www.wsl.ch/fe/biodiversitaet/produkte/batscope/ or bats@wsl.ch
BATLOGGER Manual Elekon AG Nov. 2012 20/28
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