Two typical events, both during the same minute:
A swoop:
Two clicks:
Close-up of the first click:
Close-up of the second click:
The spectrum for this minute, from the first 0.1 s, taken from averaging the spectrum of 40 waveforms. There are 512 frequencies represented. The spikes are unique but occur in the spectra regularly; the continuum is more constant.
The standard continuum.
Evolution of the (adaptive) threshold over
one night, from
