Audiogram of the rhesus macaque (Macaca mulatta)
Data from:
A: Pfingst, B.E., Hienz, R., and Miller, J. (1975) Reaction-time procedure for measurement of hearing. II. Threshold functions. Journal of the Acoustical Society of America, 57, 431-436. (2 animals, headphones)
B: Pfingst, B.E., Laycock, J., Flammino, F., Lonsbury-Martin, B., and Martin, G. (1978) Pure tone thresholds for the rhesus monkey. Hearing Research, 1, 43-47. (13 animals, headphones)
C: Lonsbury-Martin, B., and Martin, G. (1981) Effects of moderately intense sound on auditory sensitivity in rhesus monkeys: Behavioral and neural observations. Journal of Neurophysiology,46, 563-586. (6 animals, headphones)
D: Bennett, C.L., Davis, R.T., and Miller, J.M. (1983) Demonstration of presbycusis across repeated measures in a nonhuman primate species. Behavioral Neuroscience, 97, 602-607. (2 young animals, loudspeakers)
Absolute thresholds (in dB re 20 µN/m2) for rhesus macaques (studies A through D); average represents unweighted mean of five studies)
|
Frequency (in kHz) |
Average Thresholds (in dB) |
Average |
|||
|
A |
B |
C |
D |
||
|
.125 |
38 |
38.9 |
— |
33 |
37 |
|
.250 |
23 |
24.6 |
— |
|
24 |
|
.500 |
17.5 |
— |
22 |
12.5 |
17 |
|
1 |
7 |
8.9 |
12.5 |
|
10 |
|
2 |
8 |
6.5 |
9.5 |
5 |
7 |
|
4 |
12 |
16.3 |
18 |
0 |
12 |
|
8 |
1 |
5.7 |
5 |
— |
4 |
|
16 |
7 |
7 |
8 |
8 |
8 |
|
22.6 |
— |
— |
— |
15 |
15 |
|
32 |
24 |
30 |
31 |
38 |
31 |
|
40 |
— |
53.1 |
— |
— |
53 |
|
45 |
73.5 |
79.2 |
— |
— |
76 |
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 |
— |
44 |
|
60 |
— |
42 |
|
50 |
— |
39 |
|
40 |
.110 |
35 |
|
30 |
.185 |
32 |
Additional Parameters:
Body weight = 12 kg
Functional interaural distance = 424 µs
(Time required for sound to travel around the head from one auditory meatus to the other.)
Comments: Threshold values taken from graphs. Tones presented via headphones except for D.