Audiogram of the spiny mouse (Acomys cahirinus)
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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 four spiny mice (designated A through D
|
Ìý Frequency (in kHz) |
Individual Thresholds (in dB) |
Ìý Average |
|||
|
A |
B |
C |
D |
||
|
1 |
83 |
79 |
84.5 |
79 |
81.4 |
|
2 |
66 |
56 |
67 |
67 |
64 |
|
4 |
44 |
41 |
56 |
39 |
45 |
|
8 |
16 |
8.5 |
24 |
8 |
14.1 |
|
16 |
16 |
8.5 |
23 |
25 |
18.1 |
|
32 |
41 |
23 |
31 |
31 |
31.5 |
|
45 |
— |
27 |
— |
30 |
28.5 |
|
50 |
— |
— |
— |
20 |
— |
|
56 |
— |
— |
— |
29 |
— |
|
64 |
68 |
36 |
40 |
35 |
44.8 |
|
80 |
83 |
73 |
>82 |
71 |
78 |
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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 |
1.55 |
75.5 |
|
60 |
2.3 |
70.5 |
|
50 |
3.33 |
66 |
|
40 |
4.5 |
57 |
|
30 |
5.6 |
45 |
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Additional Parameters:
Body weight = 55 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.