A re-evaluation of auditory filter shape in delphinid odontocetes: Evidence of constant-bandwidth filters
| Autor: | Paul E. Nachtigall, Laura N. Kloepper, Brian K. Branstetter, Whitlow W. L. Au, David W. Lemonds, Stephanie Vlachos |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Signal Detection
Psychological Acoustics and Ultrasonics Bioacoustics Acoustics Arts and Humanities (miscellaneous) otorhinolaryngologic diseases medicine Animals Auditory system Acoustic filters Physics Behavior Animal biology Bandwidth (signal processing) Auditory Threshold White noise Bottlenose dolphin biology.organism_classification Bottle-Nosed Dolphin medicine.anatomical_structure Acoustic Stimulation Auditory Perception Audiometry Pure-Tone Female sense organs Noise Perceptual Masking Psychoacoustics |
| Zdroj: | The Journal of the Acoustical Society of America. 130:3107-3114 |
| ISSN: | 0001-4966 |
| DOI: | 10.1121/1.3644912 |
| Popis: | The auditory filter shape of delphinid odontocetes was previously considered to be typically mammalian constant-quality in which filter bandwidths increase proportionally with frequency. Recent studies with porpoises demonstrate constant-bandwidth portions of the auditory filter. The critical ratios for a bottlenose dolphin were measured between 40 and 120 kHz by behaviorally determining the subject's ability to detect pure tones in the presence of white noise. Critical ratios as a function of frequency were constant, indicating the auditory filter acts as a constant-bandwidth system in this frequency range. Re-analysis of past studies supports these findings, and suggests the delphinid auditory system is best characterized as a constant-Q system below 40 kHz and a constant-bandwidth-like system between 40 kHz and 120 kHz before returning to a constant Q pattern at the highest frequencies. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|