Detected Calls list

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Contents

Detected calls

The name of the call definition used to detect that call. See Call definitions

Color

The color of the call definition the call belongs to.

Duration (ms)

Duration of the detected call. This equals Stop time – Start time.

Start time (s)

The start time is back-calculated when a number of samples above the Min amplitude (set in the call definition) have been found that exceed the Min duration (set in the call definition). From this time (tm in the figure below) the Min duration is then subtracted to obtain the Start time.

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Stop time (s)

The stop time is back-calculated when a number of samples with low amplitude values (that is, below the Min amplitude in the call definition) have been found that exceed the Min gap time set in the call definition. From this time (tg in the figure below), the Min gap time is subtracted to obtain the Stop time.

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The call is then fully defined with its Start time and Stop time:

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Freq at Max Amp (Hz)

The frequency at which the amplitude is the highest in that call.

Mean Amplitude

The mean amplitude of a call is calculated as the sum of the amplitude of all points inside the call rectangle with an amplitude above the specified Min amplitude limit (in the call definition), divided by the number of points found.

White background points in the spectrogram are generally not be included as they would reduce the mean amplitude to a meaningless low value. This means also that mean amplitude is always higher than (or equal to) the Min amplitude limit.

See also

nHow detected calls are sorted

nExplore the detected calls