Figure 2 in Bryde's whale calls recorded in the Gulf of Mexico

Figure 2. Time series and spectrograms of Bryde's whale calls. (A) Be9 pulses recorded with a sonobuoy on 31 July 2011 (600 point FFT, 98% overlap, Hanning window, band-pass filter 60–130 Hz), (B) Be9 call sequence recorded on the HARP at DeSoto Canyon on 8 June 2011 (1,000 point FFT, 95% overlap, Hanning window, band–pass filter 60–130 Hz), and (C) possible Bryde's whale calls recorded on the HARP at DeSoto Canyon on 24 June 2011 (1,000– point FFT, 95% overlap, Hanning window, band–pass filter 110–180 Hz).