Audiogram of the ringtail lemur (Lemur catta)
Data from: Gillette, R.G., Brown, R., Herman, P., Vernon, S. and Vernon, J. (1973) The auditory sensitivity of the lemur. American Journal of Physical Anthropology, 38, 365-370.
Average absolute thresholds (in dB re 20 µN/m2) based on 5-6 ringtail lemurs
|
Frequency (in kHz) |
Average Threshold (in dB) |
|
|
.1 |
49 |
|
|
.2 |
36 |
|
|
.5 |
19 |
|
|
1 |
7 |
|
|
2 |
6 |
|
|
4 |
8 |
|
|
8 |
3 |
|
|
15 |
12 |
|
|
25 |
14 |
|
|
32 |
15 |
|
|
40 |
29 |
|
|
50 |
50 |
|
|
60 |
64 |
|
|
70 |
87 |
|
|
75 |
93 |
|
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 |
— |
63 |
|
60 |
.067* |
58 |
|
50 |
.096 |
50 |
|
40 |
.160 |
45 |
|
30 |
.275 |
41 |
*Extrapolated value
Additional Parameters:
Body weight = 2.7 kg
Functional interaural distance= 280 µs
(Time required for sound to travel around the head from one auditory meatus to the other.)
Comments: Threshold values taken from graph in Gillette et al., 1973.