Adjust frequency and time boundaries in a call

Aim

To edit the frequency and time boundaries of a call if they do not match the call spectrogram.

Do this for example when the red rectangle around a detected call does not include some weak signal that you believe it is part of that call.

Procedure

Adjust the frequency boundaries

1.In the Spectrogram, hover the mouse cursor over the upper side (to adjust the High frequency boundary) or the lower side (to adjust the Low frequency boundary) of the rectangle around the call.

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2.When the mouse cursor turns a double-headed arrow, drag the boundary up or down to the new position.

3.To save the changes, select File > Save or press Ctrl+S.

Adjust the time boundaries

1.In the Spectrogram, hover the mouse cursor over the one of the lateral sides of the rectangle around the call, depending on where you want to adjust the start boundary or the end boundary.

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2.When the mouse cursor turns a double-headed arrow, drag the boundary up or down to the new position.

3.To save the changes, select File > Save or press Ctrl+S.

Notes

nWhen you edit the frequency or time boundaries in a call, the values reported in the call list for the corresponding call are updated.

If you adjust the frequency boundaries, you’ll notice that the values Freq at Max Amp and/or Mean Amplitude will change.

If you adjust the time boundaries, you’ll notice that one or more of the following values change: Duration, Start Time (or Stop Time), Freq at Max Amp and Mean Amplitude.

See also

nAdjust a call definition