Audiogram of the Reindeer (Rangifer tarandus)
Data from: Flydal, K., Hermansen, A., Enger, P.S., and Reimers, E. (2001) Hearing in reindeer (Rangifer tarandus). J. Comparative Physiology A, 187, 265-269.
Absolute thresholds (in dB re 2 µN/m2) for two reindeer (A, B speaker in front; C, D speaker in rear; average includes only rear positions)
|
Frequency (in kHz) |
Individual Thresholds (in dB) |
Average |
|||
|
A |
B |
C |
D |
||
|
.063 |
79 |
79 |
61 |
63 |
62 |
|
.125 |
68 |
70 |
50 |
49 |
49.5 |
|
.250 |
41 |
43 |
38 |
39 |
38.5 |
|
.500 |
20 |
26 |
19 |
24 |
21.5 |
|
1 |
17 |
14 |
9 |
9 |
9 |
|
2 |
23 |
25 |
17 |
15 |
16 |
|
4 |
18 |
19 |
9 |
0 |
4.5 |
|
8 |
20 |
25 |
-1 |
6 |
2.5 |
|
16 |
24 |
23 |
7 |
4 |
5.5 |
|
32 |
48 |
42 |
25 |
21 |
23 |
|
38 |
-- |
68 |
63 |
59 |
61 |
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 |
(.040) |
(49) |
|
60 |
.070 |
37.7 |
|
50 |
.125 |
36 |
|
40 |
.225 |
34.5 |
|
30 |
.350 |
33 |
Additional Parameters:
Body weight = 79 kg
Functional interaural distance = 548 µs (based on diameter of skull)
(Time required for sound to travel around the head from one auditory meatus to the other.)
Comments: Threshold values taken from table in published paper.