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You can listen to bats using Wildlife Acoustics patented Real Time
Expansion (RTE) or Heterodyne (HET). RTE translates the
ultrasonic sounds to a range that is audible to humans by taking
tiny snippets of the sound and slowing it down. Since there is
quite a bit of space in between bat echolocation calls relative to
the length of the call, the space in between is used to play back
the slowed down call. When in HET mode, double tap the grey
frequency reference control to go into auto-het mode. This will
constantly tune to the frequency with the most energy above the
RTE/HET/OFF toggle
off
Pinch and zoom in
time or frequency on
the spectrogram or
waveform
Tap to activate
frequency reference
line (drag to move)
Spectrogram Settings
Slide to change
waveform display size