The effect of hearing impairment on localization dominance for single-word stimuli.
J Acoust Soc Am
; 130(1): 312-23, 2011 Jul.
Article
en En
| MEDLINE
| ID: mdl-21786901
Localization dominance (one of the phenomena of the "precedence effect") was measured in a large number of normal-hearing and hearing-impaired individuals and related to self-reported difficulties in everyday listening. The stimuli (single words) were made-up of a "lead" followed 4 ms later by a equal-level "lag" from a different direction. The stimuli were presented from a circular ring of loudspeakers, either in quiet or in a background of spatially diffuse babble. Listeners were required to identify the loudspeaker from which they heard the sound. Localization dominance was quantified by the weighting factor c [B.G. Shinn-Cunningham et al., J. Acoust. Soc. Am. 93, 2923-2932 (1993)]. The results demonstrated large individual differences: Some listeners showed near-perfect localization dominance (c near 1) but many showed a much reduced effect. Two-thirds (64/93) of the listeners gave a value of c of at least 0.75. There was a significant correlation with hearing loss, such that better hearing listeners showed better localization dominance. One of the items of the self-report questionnaire ("Do you have the impression of sounds being exactly where you would expect them to be?") showed a significant correlation with the experimental results. This suggests that reductions in localization dominance may affect everyday auditory perception.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Localización de Sonidos
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Percepción del Habla
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Personas con Deficiencia Auditiva
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Trastornos de la Audición
Tipo de estudio:
Diagnostic_studies
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Observational_studies
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Prognostic_studies
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Qualitative_research
Límite:
Adult
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Aged
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Humans
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Middle aged
Idioma:
En
Revista:
J Acoust Soc Am
Año:
2011
Tipo del documento:
Article
País de afiliación:
Reino Unido