Learning to discriminate interaural time differences: an exploratory study with amplitude-modulated stimuli.
The advent of bilateral cochlear implants (CIs) has increased interest in learning on binaural tasks, and studies in normal-hearing listeners provide important background information. However, few studies have considered learning with discrimination of interaural time difference (ITD). Here, learnin...
| Publicado en: | International Journal of Audiology Vol. 45; no. 9; pp. 513 - 521 |
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| Autores principales: | , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Sep2006
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106244923&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106244923 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 14992027 JW2 jtl: International Journal of Audiology issn: 14992027 maglogo: Y pubinfo: dt: Sep2006 vid: 45 iid: 9 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 106244923 2009335969 10.1080/14992020600801434 NLM17005494 106244923 ppf: 513 ppct: 8 formats: fmt: @attributes: type: P tig: atl: Learning to discriminate interaural time differences: an exploratory study with amplitude-modulated stimuli. aug: au: Rowan D Lutman ME affil: Institute of Sound and Vibration Research, University of Southampton, Southampton, SO17 1BJ, UK; dr@isvr.soton.ac.uk sug: subj: Auditory Perception Learning Time Factors Acoustic Stimulation Adult Descriptive Statistics Exploratory Research Funding Source Pretest-Posttest Design Students, College T-Tests United Kingdom Waveforms Human Adult: 19-44 years ab: The advent of bilateral cochlear implants (CIs) has increased interest in learning on binaural tasks, and studies in normal-hearing listeners provide important background information. However, few studies have considered learning with discrimination of interaural time difference (ITD). Here, learning with ITD was explored using stimuli that are more relevant to bilateral CIs than used previously. Inexperienced listeners were trained with envelope-based ITD using high-frequency amplitude-modulated tones with or without an interaural carrier frequency difference (IFD), the former to simulate asymmetrical bilateral CI insertions. All were tested with and without IFD before and after training. In most listeners, ITD thresholds improved substantially with training, not necessarily reaching asymptote after 3000 trials. In these, the magnitude and time-course of learning was larger than anticipated from a previous study with low-frequency ITD. Learning generalized across IFD and the effect of IFD on ITD thresholds at post-test was smaller than reported previously. These results have implications for studies of bilateral CIs, such as the need to provide extensive training to avoid over-estimating any apparent 'impairment'. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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