Audiogram of the least weasel (Mustela nivalis)
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Data from: Heffner, R.S., and Heffner, H.E. (1985) Hearing in mammals: The least weasel. Journal of Mammalogy, 66, 745-755.
Ìý
Absolute thresholds (in dB re 20 µN/m2) for two least weasels
(designated A and B)
|
Ìý Frequency (in kHz) |
Individual Thresholds (in dB) |
Ìý Average |
|
|
A |
B |
||
|
.016 |
89 |
69 |
79 |
|
.0315 |
73 |
60 |
66.5 |
|
.063 |
62 |
52 |
57 |
|
.090 |
56 |
43 |
49.5 |
|
.125 |
46 |
44 |
45 |
|
.250 |
27 |
35 |
31 |
|
.500 |
17 |
18 |
17.5 |
|
1 |
2 |
-2 |
0 |
|
2 |
-8 |
-8 |
-8 |
|
4 |
6 |
2 |
4 |
|
8 |
1 |
7 |
4 |
|
16 |
1 |
-1.5 |
0 |
|
32 |
6 |
10 |
8 |
|
45 |
6 |
20 |
13 |
|
64 |
68 |
70 |
69 |
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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 |
.026 |
64 |
|
60 |
.050 |
60 |
|
50 |
.087 |
56 |
|
40 |
.160 |
52 |
|
30 |
.255 |
49.5 |
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Additional Parameters:
Body weight = 45 g
Functional interaural distance= 76 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 original data.