Audiogram of the wood rat (Neotoma floridana)
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.
Absolute thresholds (in dB re 20 µN/m2) for two wood rats
(designated A and B)
|
Frequency (in kHz) |
Individual Thresholds (in dB) |
Average |
|
|
A |
B |
||
|
.500 |
80 |
78 |
79 |
|
1 |
50 |
66 |
58 |
|
2 |
32 |
45 |
38.5 |
|
4 |
16 |
19 |
17.5 |
|
8 |
-3 |
-3 |
-3 |
|
16 |
9 |
2 |
5.5 |
|
32 |
16 |
19 |
17.5 |
|
45 |
38 |
42 |
40 |
|
64 |
63 |
79 |
71 |
|
76 |
73 |
— |
— |
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 |
.680 |
64 |
|
60 |
.940 |
56 |
|
50 |
1.340 |
51 |
|
40 |
1.920 |
45 |
|
30 |
2.8 |
37 |
Additional Parameters:
Body weight = 350 g
Functional interaural distance= 115 µs
(Time required for sound to travel around the head from one auditory meatus to the other.)
Comments: Threshold values taken from original data.