Delayed Stream Segregation in Older Adults: More Than Just Informational Masking.
Ear Hear
; 36(4): 482-4, 2015.
Article
en En
| MEDLINE
| ID: mdl-25587669
ABSTRACT
OBJECTIVE:
To determine whether the time course for the buildup of auditory stream segregation differs between younger and older adults.DESIGN:
Word recognition thresholds were determined for the first and last keywords in semantically anomalous but syntactically correct sentences (e.g., "A rose could paint a fish") when the target sentences were masked by speech-spectrum noise, 3-band vocoded speech, 16-band vocoded speech, intact and colocated speech, and intact and spatially separated speech. A significant reduction in thresholds from the first to the last keyword was interpreted as indicating that stream segregation improved with time.RESULTS:
The buildup of stream segregation is slowed for both age groups when the masker is intact, colocated speech.CONCLUSIONS:
Older adults are more disadvantaged; for them, stream segregation is also slowed even when a speech masker is spatially separated, conveys little meaning (3-band vocoding), and vocal fine structure cues are impoverished but envelope cues remain available (16-band vocoding).
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Enmascaramiento Perceptual
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Percepción del Habla
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Envejecimiento
Límite:
Adult
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Aged
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Female
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Humans
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Male
Idioma:
En
Revista:
Ear Hear
Año:
2015
Tipo del documento:
Article
País de afiliación:
China