Audiogram of the naked mole rat (Hetercephalus glaber)
Ìý
Data from: Heffner, R.S., and Heffner, H.E. (1993) Degenerate hearing and sound localization in naked mole rats (Heterocephalus glaber), with an overview of central auditory structures. Journal of Comparative Neurology, 331, 418-433.
Ìý
Absolute thresholds (in dB re 20 µN/m2) for four naked mole rats (designated A through D
|
Ìý Frequency (in kHz) |
Individual Thresholds (in dB) |
Ìý Average |
|||
|
A |
B |
C |
D |
||
|
.008 |
86 |
87 |
88 |
79 |
85 |
|
.016 |
70 |
76 |
85 |
70 |
75.3 |
|
.032 |
68 |
70 |
67 |
59 |
66 |
|
.063 |
62 |
63 |
64 |
56 |
61.3 |
|
.125 |
45 |
41 |
47 |
40 |
43.3 |
|
.250 |
43 |
45 |
42 |
40 |
42.5 |
|
.500 |
43 |
46 |
46 |
39 |
43.5 |
|
1 |
38 |
35 |
48 |
40 |
40.3 |
|
2 |
40 |
40 |
39 |
34 |
38.3 |
|
4 |
34 |
29 |
45 |
31 |
34.8 |
|
8 |
46 |
38 |
49 |
41 |
43.5 |
|
11.2 |
58 |
47 |
64 |
60 |
57.3 |
|
16 |
86 |
90 |
89 |
85 |
87.5 |
Ìý
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 |
.0233 |
12.9 |
|
60 |
.065 |
11.5 |
|
50 |
.096 |
9.4 |
|
40 |
1. |
6.1 |
|
30 |
— |
— |
Ìý
Additional Parameters:
Body weight = 40 g
Functional interaural distance= 61 µs
(Time required for sound to travel around the head from one auditory meatus to the other.)
Ìý
Comments: Threshold values taken from original data.