Hearing and vocalizations in the orange-fronted conure (Aratinga canicularis).
The auditory sensitivities of the orange-fronted conure (Aratinga canicularis) were examined in relation to the spectral characteristics of its vocalizations. Absolute thresholds, masked thresholds, frequency difference limens, and intensity difference limens for pure tones were obtained using psychoacoustic techniques. In general, hearing abilities are similar to those found in many avian auditory generalists. One exception is the unusually low critical ratio (masked threshold) between 2.0 and 4.0 kHz, similar to that previously found in the budgerigar (Melopsittacus undulatus). These auditory sensitivities were compared with average spectra for (a) contact calls and (b) a general sample of vocalizations recorded from wild birds. The spectral regions of both greatest vocal energy and best auditory sensitivity were between 2.0 and 5.0 kHz.
Department of Psychology, University of Maryland, USA. tw98@umail.umd.edu
Timothy F
TF
Wright
Kathryn A
KA
Cortopassi
Jack W
JW
Bradbury
Robert J
RJ
Dooling
D000818:Animals; D001309:Auditory Threshold / Q000502:physiology; D001717:Birds; D006309:Hearing / Q000502:physiology*; D010470:Perceptual Masking / Q000502:physiology; D011571:Psychoacoustics; D013018:Sound Spectrography / Q000295:instrumentation; D013637:Tape Recording; D014743:Videotape Recording; D014828:Vocalization, Animal / Q000502:physiology*