Figure 1
From: The influence of sea ice on the detection of bowhead whale calls
Spectrograms of bowhead FM calls including: (A) upsweep, (B) undulating n, (C) downsweep, and (D) constant. Undulating u call type not shown. Sample rate: 2000 Hz, FFT length: 550 samples, window overlap: 87%, window type: Hanning.
