Audiogram of the chinchilla (Chinchilla laniger)
Data from: Heffner, R.S., and Heffner, H.E. (1991) Behavioral hearing range of the chinchilla. Hearing Research, 52, 13-16.
Absolute thresholds (in dB re 2 µN/m2) for three chinchillas (designated A, B, and C)
|
Frequency (in kHz) |
Individual Thresholds (in dB) |
Average |
||
|
A |
B |
C |
||
|
.0315 |
79 |
83 |
83 |
82 |
|
.0625 |
49 |
53 |
55 |
52 |
|
.125 |
35 |
26 |
25 |
29 |
|
.250 |
16 |
15 |
15 |
15 |
|
.500 |
12 |
6 |
7 |
8 |
|
1 |
9 |
3 |
6 |
7 |
|
2 |
9 |
5 |
9 |
8 |
|
4 |
8 |
5 |
7 |
7 |
|
8 |
20 |
21 |
21 |
21 |
|
16 |
29 |
10 |
26 |
22 |
|
32 |
51 |
68 |
59 |
59 |
|
45 |
>89 |
>86 |
>86 |
>86 |
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 |
.0425 |
36 |
|
60 |
.052 |
32.5 |
|
50 |
.066 |
27 |
|
40 |
.089 |
22.5 |
|
30 |
.120 |
18.5 |
Additional Parameters:
Body weight = 400 g
Functional interaural distance= 225 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 cited and discussed in Heffner and Heffner, 1991.