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Publication Detail
The influence of the envelope waveform on binaural tuning of neurons in the inferior colliculus and its relation to binaural perception.
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Journal Article
  • Authors:
    Dietz M, Marquardt T, Greenberg D, McAlpine D
  • Publication date:
    2013
  • Pagination:
    223, 230
  • Journal:
    Adv Exp Med Biol
  • Volume:
    787
  • Status:
    Published
  • Country:
    United States
  • Print ISSN:
    0065-2598
  • Language:
    eng
  • Keywords:
    Animals, Auditory Pathways, Auditory Perception, Auditory Threshold, Guinea Pigs, Humans, Inferior Colliculi, Models, Neurological, Psychoacoustics, Sound Localization, Time Perception
Abstract
Recently, Klein-Hennig et al. (J Acoust Soc Am 129:3856–3872, 2011) suggested a design for envelope waveforms that allows for independent setting of the duration of the four segments of an envelope cycle – pause, attack, sustain, and decay. These authors conducted psychoacoustic experiments to determine the threshold interaural time differences (ITDs) for different waveforms and revealed that a steep attack flank and at least 4 ms of pause duration prior to the attack are optimal for discrimination performance, whilst sustained and decay durations were of only minor influence. The current study tests the sharpness of rate-ITD-functions recorded in the inferior colliculus of guinea pigs in response to a similar set of waveforms, examining their relationship to the psychoacoustic data. Particular focus is applied to temporally asymmetric envelope waveforms: a long 15-ms attack and a short 1.5-ms decay envelope and the temporally inverted envelope with a short 1.5-ms attack and a long 15-ms decay.
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