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Effects of dynamic range compression on spatial selective auditory attention in normal-hearing listeners
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10.1121/1.4794386
/content/asa/journal/jasa/133/4/10.1121/1.4794386
http://aip.metastore.ingenta.com/content/asa/journal/jasa/133/4/10.1121/1.4794386

Figures

Image of FIG. 1.
FIG. 1.

Spatial thresholds in Experiment 1 (top) and Experiment 2 (bottom), for independent (open circles), linear (plusses), and linked (filled circles) compression. Symbols mark the medians of each data set, boxes indicate the inter-quartile range, and whiskers indicate the full range of results. N = 10 for each condition except Reverberant, in which N = 13.

Image of FIG. 2.
FIG. 2.

Within-subject differences of spatial thresholds for linear (plusses) and linked compression (filled circles), both relative to independent compression. Symbols mark the medians of each data set, boxes indicate the inter-quartile range, and whiskers indicate the full range of results. Negative values indicate smaller thresholds (better performance) compared to independent compression. Statistical significance is assessed by a directional Wilcoxon signed-rank test, and indicated by a * for p < 0.05, ** for p < 0.01, and *** for p < 0.005.

Image of FIG. 3.
FIG. 3.

RAU scores for fixed-azimuth digits with maskers at 15° (white boxes) and 90° (gray boxes) for linear, independent compression, and linked compression (plusses, open circles, and filled circles, respectively). Symbols mark the medians of each data set, boxes indicate the inter-quartile range, and whiskers indicate the full range of results. Gray-dashed lines represent the spatial threshold performance point estimated by the adaptive procedure for the corresponding groups (∼65.5 and 50 RAU for the TIME groups and the REVERB groups, respectively).

Image of FIG. 4.
FIG. 4.

Within-subject differences of RAU scores for linear (plusses) and linked compression (filled circles) relative to independent compression for 15° maskers. Symbols mark the medians of each data set, boxes indicate the inter-quartile range, and whiskers indicate the full range of results. Positive values indicate better performance compared to independent compression. Statistical significance was assessed by pairwise t-tests, and is marked with a * for p < 0.05 and ** for p < 0.01. Differences for 90° maskers were not significant for any group and are omitted for visual clarity.

Image of FIG. 5.
FIG. 5.

Left: Error rates for switch errors, in which subjects reported a masker digit, and drop errors, in which subjects reported a digit not in either target or masker sequences. Bars indicate median error rate across all subjects (N = 63) in both experiments; error bars represent inter-quartile range. Right: Within-subject differences in error rates for switch and drop errors for linear and linked compression relative to independent compression. Negative values indicate lower drop or switch errors relative to independent compression. Symbols indicate the median across all subjects, boxes show the interquartile range, and whiskers show the full range. Statistical significance is assessed by Wilcoxon sign-rank tests, and is marked by *** for p < 0.001 and **** for p < 0.0001.

Tables

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TABLE I.

Summary of the groups tested.

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/content/asa/journal/jasa/133/4/10.1121/1.4794386
2013-04-03
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effects of dynamic range compression on spatial selective auditory attention in normal-hearing listeners
http://aip.metastore.ingenta.com/content/asa/journal/jasa/133/4/10.1121/1.4794386
10.1121/1.4794386
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