S
ETTINGS
Settings
Using the freely supplied software tools (see ecoObs downloads page) you
can setup your Mini-batcorder according to your needs.
Filecode
The
Filecode
consists of ten alphanumeric characters (including underscore)
and is used as identification of a recording.
Quality
The standard value for
Quality
is 20, which is optimal for most bats in com-
mon recording situations. At higher values (>20), less call like signals will be
recognized, while lowering the
Quality
value (<20) tightens up the trigger al-
gorithm.
Threshold
The
Threshold
influences the recording range of the
batcorder
. The standard
value of -27 dB is approximate to an amplitude of 4.5% of the maximal ampli-
tude. This resembles a recording distance (radius) of at least 10 meters for
most European bat species. If you want to increase the recording range,
Threshold
has to be lowered to a value of -30 dB or -36 dB. A change of the
threshold value does not change the
batcorder
s gain! Only signals with am-
plitudes above the threshold will be analyzed. Possible values are -18, -24, -
27, -30, -36 dB and -42 dB ( 12.5% to 0.8% of maximal amplitude). If you use
a value different from -27 dB you have to adjust the appropriate setting in
bcAdmin. In newer versions of bcAdmin the threshold is set in the same
steps as in the batcorder menu.
Posttrigger
The post trigger 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. We recommend a value of 400 ms
or 600
ms. Possible values are 0 ms, 200 ms, 400 ms, 600 ms and 800 ms.
14
