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Acceptable range of speech level for both young and aged listeners in reverberant and quiet sound fields
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10.1121/1.2766780
/content/asa/journal/jasa/122/3/10.1121/1.2766780
http://aip.metastore.ingenta.com/content/asa/journal/jasa/122/3/10.1121/1.2766780

Figures

Image of FIG. 1.
FIG. 1.

Audiograms for listeners used in tests I and II. Open circles and triangles respectively represent those for the young and the aged in test I. Closed triangles represent that for the aged in test II. Solid lines in the right panel represent mean hearing levels for 20-, 60-, 70- and 80-year-old listeners estimated according to ISO 7029. The estimated hearing levels are the average of those for male and female listeners.

Image of FIG. 2.
FIG. 2.

Word intelligibility scores and listening difficulty ratings as a function of speech level in the reverberation-free and quiet sound field. Closed and open symbols respectively represent word intelligibility scores and listening difficulty ratings. Circles and triangles respectively represent the results for the young and the aged.

Image of FIG. 3.
FIG. 3.

The word intelligibility scores for the young in reverberant and quiet sound fields. Open circles, triangles and squares represent the word intelligibility scores for the reverberation times of 0.5, 1.0 and , respectively.

Image of FIG. 4.
FIG. 4.

The listening difficulty ratings for the young in reverberant and quiet sound fields. Open circles, triangles and squares represent the listening difficulty ratings for the reverberation times of 0.5, 1.0 and , respectively.

Image of FIG. 5.
FIG. 5.

The word intelligibility scores for the aged in reverberant and quiet sound fields. Open circles, triangles and squares represent the word intelligibility scores for the reverberation times of 0.5, 1.0 and , respectively.

Image of FIG. 6.
FIG. 6.

The listening difficulty ratings for the aged in reverberant and quiet sound fields. Open circles, triangles and squares represent the listening difficulty ratings for the reverberation times of 0.5, 1.0 and , respectively.

Image of FIG. 7.
FIG. 7.

The acceptable ranges of speech level for each of the sound fields. Open and closed bars represent the acceptable ranges for the young and the aged, respectively. The hatched bars represent the universally acceptable range.

Tables

Generic image for table
TABLE I.

Categories of listening difficulty (see Ref. 14).

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/content/asa/journal/jasa/122/3/10.1121/1.2766780
2007-09-01
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Acceptable range of speech level for both young and aged listeners in reverberant and quiet sound fields
http://aip.metastore.ingenta.com/content/asa/journal/jasa/122/3/10.1121/1.2766780
10.1121/1.2766780
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