460
IL. Aroyan et al.
TABLE 10.1. Some parameters of the blue and humpback whales signals
Species and
Call Type
Fundamental
Frequency
(Hz)
Duration
(seconds)
Intensity
(dB re lliPa)
Volume
displacement
(liters)
humpback
200
4
165
1.5
fin
25-16 swept
0.8
185
35
bowhead
250-100 swept
1.0
165
0.6
blue "A" pulse
17
0.6
182
25
blue "B" call
17
19
185
1,000
blue "D" call
70-30 swept
3
185
50
blue "c" call
10
7
155
25
9,.-----r--....,.--,------r---,--,---...,.---,---,
18
·firi .•
·16
sei
d ···bowhead
o
.. oblue(T~rner)
x humpback
4
+minke
......blue(S8 o
.
•
2
f .f+
+
6
8
10
12
14
overall whale length in meters
FIGURE 10.22. Laryngeal sac length, defined here as the distance from the ventral
tip of the epiglottis to the caudal tip of the laryngeal sac cavity, is plotted as a percentage of total whale length versus total whale length for each specimen. It appears
studies on embryos are not useful in estimating relative laryngeal sizes in adult
animals. Relative size of the laryngeal sac and nasal passages may help determine
the sound production capabilities of each species. Some data points were interpolated from drawings or other measurements when length as by our definition was
not provided. (From Turner 1870; Beauregard and Boulart 1882.)