title: Frequency Tuning of Hearing in the Beluga Whale.
abstract: Data on frequency tuning in odontocetes are contradictory: different authors have reported filter qualities from 2 to almost 50. In this study, frequency tuning was measured in a beluga whale (Delphinapterus leucas) using a rippled-noise test stimulus in conjunction with the auditory evoked potential (AEP) technique. The response to ripple reversions was considered to indicate resolvability of the ripple pattern. The limit of ripple-pattern resolution ranged from 20 to 32 ripples per octave (rpo). A model of interaction of the ripple spectrum with frequency-tuned filters suggests that this resolution limit requires a filter quality of 29-46.
authors.affiliation: Laboratory of Sensory Systems of Vertebrates, A. N. Severstov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskiy prospekt, Moscow, 119071, Russia. evgeniasysueva@gmail.com.
authors.forename: Evgeniya V
authors.initials: EV
authors.lastname: Sysueva
authors.affiliation: Laboratory of Sensory Systems of Vertebrates, A. N. Severstov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskiy prospekt, Moscow, 119071, Russia. dm.nechaev@yandex.ru.
authors.forename: Dmitry I
authors.initials: DI
authors.lastname: Nechaev
authors.affiliation: Laboratory of Sensory Systems of Vertebrates, A. N. Severstov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskiy prospekt, Moscow, 119071, Russia. vl.vlpopov@gmail.com.
authors.forename: Vladimir V
authors.initials: VV
authors.lastname: Popov
authors.affiliation: Laboratory of Sensory Systems of Vertebrates, A. N. Severstov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskiy prospekt, Moscow, 119071, Russia. alex_supin@mail.ru.
authors.forename: Alexander Y
authors.initials: AY
authors.lastname: Supin
mesh_terms: D000161:Acoustic Stimulation; D000818:Animals; D001307:Auditory Perception / Q000502:physiology*; D050643:Beluga Whale / Q000502:physiology*; D005072:Evoked Potentials, Auditory; D006309:Hearing / Q000502:physiology*; D008297:Male
keywords: Auditory evoked potentials; Ripple spectrum; Toothed whales