Auditory brainstem responses in the Eastern Screech Owl: An estimate of auditory thresholds
Journal of the Acoustical Society of America
6352_Brittan-Powell.pdf
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Abstract
The auditory brainstem response (ABR), a measure of neural synchrony, was used to estimate auditory sensitivity in the eastern screech owl (Megascops asio). The typical screech owl ABR waveform showed two to three prominent peaks occurring within 5 ms of stimulus onset. As sound pressure levels increased, the ABR peak amplitude increased and latency decreased. With an increasing stimulus presentation rate, ABR peak amplitude decreased and latency increased. Generally, changes in the ABR waveform to stimulus intensity and repetition rate are consistent with the pattern found in several avian families. The ABR audiogram shows that screech owls hear best between 1.5 and 6.4 kHz with the most acute sensitivity between 4?5.7 kHz. The shape of the average screech owl ABR audiogram is similar to the shape of the behaviorally measured audiogram of the barn owl, except at the highest frequencies. Our data also show differences in overall auditory sensitivity between the color morphs of screech owls.
Suggested Citation
Brittan-Powell, E., Lohr, B., Hahn, D., and Dooling, R., 2005, Auditory brainstem responses in the Eastern Screech Owl: An estimate of auditory thresholds: Journal of the Acoustical Society of America, v. 118, no. 1, p. 314-321, https://doi.org/10.1121/1.1928767.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Auditory brainstem responses in the Eastern Screech Owl: An estimate of auditory thresholds |
| Series title | Journal of the Acoustical Society of America |
| DOI | 10.1121/1.1928767 |
| Volume | 118 |
| Issue | 1 |
| Year Published | 2005 |
| Language | English |
| Contributing office(s) | Patuxent Wildlife Research Center |
| Description | 314-321 |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of the Acoustical Society of America |
| First page | 314 |
| Last page | 321 |