Audiogram of the Common Vampire Bat (Desmodus rotundus)
Data from: Heffner, R.S. Koay, G., and Heffner, H.E. (2013) Hearing in American leaf-nosed bats. IV: The Common vampire bat, Desmodus rotundus. Hearing Research, 296, 42-50.
Absolute thresholds (in dB re 20 µN/m2) for three Common Vampire Bats (designated A through C)
|
Frequency (in kHz) |
Individual Thresholds (in dB) |
Average |
||
|
A |
B |
C |
||
|
.5 |
73.5 |
69.5 |
72.5 |
71.8 |
|
.625 |
64.5 |
62.5 |
65 |
64 |
|
.800 |
60.5 |
54 |
54.5 |
56.3 |
|
1 |
54.5 |
46.5 |
49 |
50 |
|
1.25 |
45 |
39 |
43 |
42.3 |
|
1.6 |
35.5 |
33 |
35 |
34.5 |
|
2 |
30.5 |
27.5 |
27 |
28.3 |
|
2.36 |
37.5 |
33 |
33.75 |
34.8 |
|
2.8 |
33 |
27.5 |
28 |
29.5 |
|
33.5 |
26 |
22.5 |
24 |
24.2 |
|
4 |
20.5 |
18.5 |
23 |
20.7 |
|
5 |
27.5 |
24 |
28.5 |
26.7 |
|
6.3 |
16.5 |
15.5 |
18.5 |
16.8 |
|
8 |
7 |
7.5 |
8 |
7.5 |
|
10 |
4.5 |
4 |
3.5 |
4 |
|
12.5 |
2 |
2 |
1.5 |
1.8 |
|
16 |
-3 |
-3 |
-2.5 |
-2.8 |
|
20 |
-5 |
-5.5 |
-4.5 |
-5 |
|
25 |
1 |
-0.5 |
-0.5 |
0 |
|
32 |
3 |
2.5 |
2.5 |
2.7 |
|
40 |
3.5 |
3 |
4 |
3.5 |
|
50 |
8.5 |
8 |
6 |
7.5 |
|
63 |
19 |
22 |
19 |
20 |
|
71 |
0.5 |
-0.5 |
2 |
0.7 |
|
80 |
9.5 |
8 |
7 |
8.2 |
|
90 |
13.5 |
15 |
12.5 |
13.7 |
|
100 |
22 |
22.5 |
20.5 |
22.7 |
|
112 |
60.5 |
56 |
53.5 |
56 |
|
116 |
81.5 |
73 |
68.5 |
74.3 |
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 |
.510 |
115 |
|
60 |
.716 |
113 |
|
50 |
1 |
111 |
|
40 |
1.3 |
108 |
|
30 |
1.9 |
105 |
Additional Parameters:
Body weight = 29 g
Functional interaural distance = 61 µs
(Time required for sound to travel around the head from one auditory meatus to the other.)
Comments: Threshold values taken from original data.