11.3.2019
GSM BC englische Version 1.0 working copy - Google Docs
https://docs.google.com/document/d/1VKt6uoJvSfEkYLDzHNqqOVF-sEzni9rJ_CeRmnapthk/edit
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OPERATION MANUAL GSM-BATCORDER
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sensitivity of the GSM batcorder in analysing the detected calls is determined. It is
set to a threshold in relation to the full gain.
A change of the threshold value does not change the batcorders gain! Only signals
with amplitudes above the threshold will be analyzed. Possible values are: -18, -24,
-27, -30, -36, -42 dB.
-18dB refers hereby to the least sensitive value. A difference of +/- 6dB leads to
double/half sensitivity.
The preset default value is -36dB.
Posttrigger
The posttrigger value is defined by the interval between two successive detected
calls that are still written into the same sound file. After this interval a new recording
is started if a call is recognized.
The default setting is 200ms.
Critical Frequency
The critical frequency is very important for bat call recognition. Calls below this
frequency are ignored in the analysis. Values of 14kHz up to 110kHz are possible an
adjustable in steps of 2kHz.
The default value is 16kHz.
Noise-Filter
With the GSM-batcorder you have the possibility of disturbance suppression.
Therefore numerous recordings of disturbances have been analyzed and so it was
possible to adjust the bat call detection, so that short events, which are surely no
bat calls, are identified and not recorded. The NOISE-FILTER should only be used if
massive interferences occur.
Default Settings
By pressing the Fn (
▾
) the default values for Quality=20, Threshold=-36dB,
Posttrigger=200 ms, Critical Frequency = 16 kHz and Noise Filter = OFF can be set.
Summary of Contents for GSM-BATCORDER 1.0
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