2. Physical Acoustics of Underwater Sound Communication
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Figure 2.5. Spectrographic examples of songs from four different species of baleen whales. The time and frequency scales are the same for the blue and fin whale examples but different for the humpback and bowhead
whale examples. Phrases in the humpback and bowhead songs are underlined with a sawtooth pattern, and the
two themes in the bowhead song are underlined with striped patterns. Blue and fin whale samples recorded by
C. Clark off San Nicolas Island in 1997 and Loreto, Mexico, in 1999, respectively; humpback whale recorded off
Kauai in 1998; bowhead whale recorded off Point Barrow, Alaska, in 1988. All recordings made using digital
recording systems with flat frequency response in the 10–5,000-Hz band.
39
Figure 2.5. Spectrographic examples of songs from four different species of baleen whales. The time and frequency scales are the same for the blue and fin whale examples but different for the humpback and bowhead
whale examples. Phrases in the humpback and bowhead songs are underlined with a sawtooth pattern, and the
two themes in the bowhead song are underlined with striped patterns. Blue and fin whale samples recorded by
C. Clark off San Nicolas Island in 1997 and Loreto, Mexico, in 1999, respectively; humpback whale recorded off
Kauai in 1998; bowhead whale recorded off Point Barrow, Alaska, in 1988. All recordings made using digital
recording systems with flat frequency response in the 10–5,000-Hz band.