Audiogram of the Japanese macaque (Macaca fuscata)
Data from: Jackson, L.S., Heffner, R.S., and Heffner, H.E. (1999) Free-field audiogram of the Japanese macaque (Macaca fuscata). Journal of the Acoustical Society of America,106, 3017-3023.
Absolute thresholds (in dB re 20 µN/m2) for five Japanese macaques
(designated A through E)
|
Frequency (in kHz) |
Individual Thresholds (in dB) |
Average |
||||
|
A |
B |
C |
D |
E |
||
|
.0125 |
77 |
76 |
81 |
|
|
78 |
|
.016 |
71 |
72 |
71 |
|
|
71.3 |
|
.025 |
66 |
60 |
63 |
|
|
63 |
|
.032 |
57 |
57 |
56 |
|
|
56.6 |
|
.063 |
34.5 |
36.5 |
37 |
|
|
36 |
|
.125 |
19 |
18.5 |
18 |
|
|
18.5 |
|
.250 |
15 |
17 |
13 |
|
|
15 |
|
.500 |
2 |
10 |
7 |
|
|
5.3 |
|
1 |
5 |
3 |
4 |
|
|
4 |
|
2 |
0 |
9 |
7 |
|
|
5.3 |
|
4 |
-2 |
1 |
4 |
|
|
1 |
|
8 |
0 |
5.5 |
8 |
|
|
4.5 |
|
16 |
1 |
0.5 |
8.5 |
|
|
3.3 |
|
32 |
37 |
38 |
43 |
39 |
|
39.3 |
|
36 |
64 |
72 |
77 |
54 |
76 |
71 |
|
40 |
85 |
89 |
92 |
|
|
88.6 |
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 |
.0175 |
38.5 |
|
60 |
.0275 |
34.5 |
|
50 |
.040 |
33.3 |
|
40 |
.055 |
32.2 |
|
30 |
.080 |
26.0 |
Additional Parameters:
Body weight = 12 kg
Functional interaural distance= 465 µs
(Time required for sound to travel around the head from one auditory meatus to the other.)
Comments: Threshold values taken from original data.
Additional audiograms based on tests with headphones available in :
Owren, M.J., Hopp, S.L., Sinnott, J.M., and Petersen, M.R. (1988) Absolute auditory thresholds in three old world monkey species (Cercopithecus aethiops, C.neglectus, Macaca fuscata) and humans (Homo sapiens). Journal of Comparative Psychology, 102, 99-107.
Smith, D.W. and Olszyk, V.B. (1997) Auditory behavioral thresholds for Japanese macaques using insert earphones. American Journal of Primatology, 41, 323-239.