Explore the spectrogram

Show the time, frequency, and amplitude at a specific point

Move the cursor over the Spectrogram and look at the values on the bottom line: t (time), f (frequency) and a (amplitude).

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Locate the frequency at maximum amplitude

1.Click one of the rows in the Detected Calls list.

2.Take note of the Freq at Max Amp (Hz).

3.Enlarge the spectrogram at the bottom-right corner of the screen.

4.Hover on the brightest (or darkest, depending on the color mapping chosen) pixel in the spectrogram. Observe the value of frequency (F).

5.If you move the cursor just on the lower side of the brightest pixel, you’ll see the value of Freq at Max Amp (Hz) displayed in the Detected Calls list.

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Move between the detected calls

1.Click one of the detected calls either in the spectrogram or in the Detected Calls list.

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2.To move through the entire recording you can also use the Up/Down arrow keys (to jump from call to call)

3.If you press the Page Up/ Page Down keys you can make longer jumps, depending on how many calls the screen can contain.

Display the next time interval

1.Click the middle buttons under Step through all data. Adjust the length of the Time interval when necessary.

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Alternatively, press the Left/Right arrow keys to display the previous/next interval, respectively.

2.The interval is highlighted in yellow in the Entire recording plot. The waveform is displayed in detail in the Selected interval plot. See View options

Zoom in and out the axes

See Zoom in/out