Audiogram of the northern elephant seal in air (Mirounga angustirostris)
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Data from: Kastak, D., and Schusterman, R.J. (1999) In-air and underwater hearing sensitivity of a northern elephant seal (Mirounga angustirostris). Canadian Journal of Zoology, 77, 1751-1758.
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Absolute thresholds (in dB re 2 µN/m2) for an elephant seal in air
|
Ìý Frequency (in kHz) |
Average Threshold (in dB) |
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| Ìý | ||
|
.100 |
78.6 |
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|
.200 |
72 |
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|
.400 |
68.8 |
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|
.800 |
57.3 |
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|
1.6 |
55.3 |
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|
3.2 |
52.7 |
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|
6.4 |
44 |
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|
8 |
45 |
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|
15 |
52 |
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|
18 |
50 |
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|
23 |
60 |
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|
28 |
67 |
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Lowest and highest frequencies audible at sound
pressure levels (SPL) ranging from 30 to 70 dB SPL
|
SPL (in dB) |
Lowest audible frequency (in kHz) |
Highest audible frequency (in kHz) |
|
70 |
.300 |
31 |
|
60 |
.660 |
23 |
|
50 |
3.8 |
18 |
|
40 |
— |
— |
|
30 |
— |
— |
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Additional Parameters:
Body weight = ??? g
Functional interaural distance = ??? µs
(Time required for sound to travel around the head from one auditory meatus to the other.)
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Comments: Threshold values taken from graph in Kastak and Schusterman, 1999.