Audiogram of Darwin’s leaf-eared mouse (Phyllotis darwini)
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Data from: Heffner, R.S., Koay, G., and Heffner, H.E. (2001) Audiograms of five species of rodents: Implications for the evolution of hearing and the encoding of pitch. Hearing Research, 157, 138-152.
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Absolute thresholds (in dB re 20 µN/m2) for two leaf-eared mice
(designated A and B)
|
Ìý Frequency (in kHz) |
Individual Thresholds (in dB) |
Ìý Average |
|
|
A |
B |
||
|
1 |
80 |
71 |
75.7 |
|
2 |
55 |
47 |
51 |
|
4 |
47 |
33 |
40 |
|
8 |
4 |
-2 |
1 |
|
11 |
2 |
-9 |
-3.5 |
|
16 |
27 |
19 |
23 |
|
32 |
31 |
19 |
24 |
|
45 |
34 |
22 |
28 |
|
50 |
23 |
18 |
20.2 |
|
56 |
27 |
24 |
25.5 |
|
64 |
35 |
26 |
30.5 |
|
72 |
55 |
41 |
48 |
|
76 |
80 |
67 |
73.5 |
|
80 |
>85 |
84 |
85 |
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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 |
1.17 |
76 |
|
60 |
1.55 |
73.5 |
|
50 |
2.1 |
72 |
|
40 |
4 |
69 |
|
30 |
4.75 |
63 |
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Additional Parameters:
Body weight = 41 g
Functional interaural distance= 64 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.