Audiogram of the fishing bat (Noctilio leporinus)
Data from: Wenstrup, J.J. (1984) Auditory sensitivity in the fish-catching bat, Noctilio leporinus. Journal of Comparative Physiology, 155, 91-101.
Absolute thresholds (in dB re 20 µN/m2) for three fishing bats (designated A through C)
|
Frequency (in kHz) |
Individual Thresholds (in dB) |
Average |
||
|
A |
B |
C |
||
|
1 |
77 |
81 |
78 |
79 |
|
2 |
— |
82 |
67 |
75 |
|
4 |
77 |
73 |
75 |
75 |
|
8 |
57 |
66 |
51 |
58 |
|
16 |
38 |
45 |
30 |
38 |
|
22 |
28 |
23 |
3 |
18 |
|
32 |
9 |
7 |
0 |
5 |
|
40 |
5 |
5 |
3 |
4 |
|
48 |
|
5.5 |
5 |
5 |
|
54 |
3 |
8 |
2 |
4.3 |
|
56 |
2 |
5 |
1 |
3 |
|
58 |
7 |
18 |
-2 |
8 |
|
60 |
— |
36 |
12 |
29 |
|
64 |
28 |
40 |
21 |
30 |
|
80 |
38 |
45 |
24 |
36 |
|
100 |
38 |
48 |
23 |
36 |
|
110 |
— |
— |
48 |
48 |
|
115 |
— |
80 |
— |
80 |
|
120 |
— |
— |
80 |
80 |
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 |
5 |
112 |
|
60 |
7.5 |
111 |
|
50 |
10.6 |
110 |
|
40 |
15 |
103 |
|
30 |
18 |
64 |
Additional Parameters:
Body weight = 69 g
Functional interaural distance= 87 µs
(Time required for sound to travel around the head from one auditory meatus to the other.)
Comments: Threshold values taken from graph in Wenstrup,1984.