Audiogram of the grasshopper mouse (Onychomys leucogaster)
Ìý
Data from: Heffner, H.E., and Heffner, R.S. (1985) Hearing in two cricetid rodents: Wood rat (Neotoma floridana and grasshopper mouse (Onychomys leucogaster). Journal of Comparative Psychology, 99, 275-288.
Ìý
Absolute thresholds (in dB re 20 µN/m2) for three grasshopper mice (designated A, B, and C)
|
Ìý Frequency (in kHz) |
Individual Thresholds (in dB) |
Ìý Average |
||
|
A |
B |
C |
||
|
.500 |
94 |
~85 |
>95 |
>92 |
|
1 |
85 |
>92 |
95 |
~92 |
|
2 |
57 |
58 |
59 |
58 |
|
4 |
38 |
26 |
33 |
32 |
|
8 |
8 |
6 |
14 |
9 |
|
16 |
15 |
17 |
20 |
17 |
|
32 |
26 |
28 |
— |
27 |
|
64 |
47 |
51 |
50 |
49 |
|
80 |
77 |
81 |
77 |
78 |
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 |
1.5 |
75 |
|
60 |
1.78 |
68 |
|
50 |
2.46 |
64.5 |
|
40 |
3.45 |
48 |
|
30 |
4.5 |
35 |
Additional Parameters:
Body weight = 46 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.