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Spatial release from masking in normally hearing and hearing-impaired listeners as a function of the temporal overlap of competing talkersa)
a)Portions of this work were presented at the 32nd MidWinter meeting of the Association for Research in Otolaryngology. Baltimore, MD, 2009.
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10.1121/1.3533733
/content/asa/journal/jasa/129/3/10.1121/1.3533733
http://aip.metastore.ingenta.com/content/asa/journal/jasa/129/3/10.1121/1.3533733

Figures

Image of FIG. 1.
FIG. 1.

Left- and right-ear audiograms (crosses and circles, respectively) for each listener in the HI group.

Image of FIG. 2.
FIG. 2.

Schematic illustration showing the temporal structure of the target (white) and masker (gray) sentences in the quiet training condition (top) as well as in the masked conditions with 0%, 50%, and 100% overlap.

Image of FIG. 3.
FIG. 3.

Individual data for the nine listeners in the NH group. Each panel shows performance (in percent correct) for a different listener as a function of spatial configuration. The three lines in each panel represent the three overlap conditions (0%, black circles; 50%, gray squares; 100%, white triangles). Dashed lines at the top of each panel show quiet performance.

Image of FIG. 4.
FIG. 4.

Individual data for the nine listeners in the HI group. Other details as per Fig. 3.

Image of FIG. 5.
FIG. 5.

Individual data for the six listeners in the NHLP group. Other details as per Fig. 3.

Image of FIG. 6.
FIG. 6.

Mean performance and SRM for the NH and HI groups (left column) and the NH subgroup without and with low-pass filtering (right column). The top and middle panels show performance (in percent correct) for the co-located and separated configurations, respectively. The bottom panel shows SRM (in percentage points—note the ordinate scale is different to upper panels). The three clusters of bars show results for the three overlap conditions. Bars represent mean results pooled across listeners and the error bars show ±1 standard deviation of the mean.

Image of FIG. 7.
FIG. 7.

Error rates for the NH and HI groups. The left and right columns show data for the co-located and separated configurations, and the three rows show masker errors, order errors, and random errors. The three clusters of bars in each panel show the three overlap conditions. Bars show the mean error rates in percent of total trials, such that the different error rates add up to the total percentage of incorrect trials. The error bars show ±1 standard deviation of the mean.

Tables

Generic image for table
TABLE I.

ANOVA results and effect sizes (partial η-squared) for analysis of overall performance. The top half of the table compares NH and HI groups. A three-way ANOVA was conducted with spatial configuration and overlap condition as within-subjects factors, and listener group as a between-subjects factor. The bottom half of the table compares NH and NHLP groups. A three-way ANOVA was conducted with spatial configuration, overlap condition, and filtering as within-subjects factors.

Generic image for table
TABLE II.

ANOVA results and effect sizes (partial η-squared) for analysis of SRM. The top half of the table compares NH and HI groups. A two-way ANOVA was conducted with listener group as a between-subjects factor and overlap condition as a within-subjects factor. The bottom half of the table compares NH and NHLP groups. A two-way ANOVA was conducted with filtering and overlap condition as within-subjects factors.

Generic image for table
TABLE III.

ANOVA results and effect sizes (partial η-squared) for analysis of error rates in NH and HI listener groups. The top third of the table shows results for masker errors, the middle third shows results for order errors, and the bottom third shows results for random errors. For each error type, a three-way ANOVA was conducted with spatial configuration and overlap condition as within-subjects factors and listener group as a between-subjects factor.

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/content/asa/journal/jasa/129/3/10.1121/1.3533733
2011-03-09
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Spatial release from masking in normally hearing and hearing-impaired listeners as a function of the temporal overlap of competing talkersa)
http://aip.metastore.ingenta.com/content/asa/journal/jasa/129/3/10.1121/1.3533733
10.1121/1.3533733
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