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The harp seal, Pagophilus groenlandicus (Erxleben, 1777). X. The air audiogram
- Source :
- Canadian Journal of Zoology. 49:385-390
- Publication Year :
- 1971
- Publisher :
- Canadian Science Publishing, 1971.
-
Abstract
- A free-field air audiogram from 1 to 32 kHz was obtained for a Pagophilus groenlandicus trained to respond to pure tone signals. The lowest threshold was at 4 kHz at a level of 29 db//0.0002 dynes/cm2. The air audiogram was generally flat. The critical ratios at 2 and 4 kHz were 10%. The lumen of the external auditory meatus is probably acoustically blocked. The outer and (or) middle ear structures and their acoustic impedance mismatch with the air are believed responsible for the comparatively irregular and slightly insensitive hearing of the seal in air.
- Subjects :
- Meatus
Behavior, Animal
biology
Pure tone
Air
Water
Auditory Threshold
Ear
Audiogram
Anatomy
Environment
biology.organism_classification
Caniformia
medicine.anatomical_structure
Middle ear
medicine
Animals
Female
Animal Science and Zoology
Acoustic impedance
Ecology, Evolution, Behavior and Systematics
Harp seal
Subjects
Details
- ISSN :
- 14803283 and 00084301
- Volume :
- 49
- Database :
- OpenAIRE
- Journal :
- Canadian Journal of Zoology
- Accession number :
- edsair.doi.dedup.....67721ea8f5f75e5b45ccf9a00db8f92e