دورية أكاديمية
MLD in children: effects of signal and masker bandwidths.
| العنوان: | MLD in children: effects of signal and masker bandwidths. |
|---|---|
| المؤلفون: | Grose JH; Division of Otolaryngology/Head & Neck Surgery, University of North Carolina at Chapel Hill, USA., Hall JW 3rd, Dev MB |
| المصدر: | Journal of speech, language, and hearing research : JSLHR [J Speech Lang Hear Res] 1997 Aug; Vol. 40 (4), pp. 955-9. |
| نوع المنشور: | Comparative Study; Journal Article; Research Support, U.S. Gov't, P.H.S. |
| اللغة: | English |
| بيانات الدورية: | Publisher: American Speech-Language-Hearing Association Country of Publication: United States NLM ID: 9705610 Publication Model: Print Cited Medium: Print ISSN: 1092-4388 (Print) Linking ISSN: 10924388 NLM ISO Abbreviation: J Speech Lang Hear Res Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Rockville, MD : American Speech-Language-Hearing Association, c1997- |
| مواضيع طبية MeSH: | Auditory Perception* , Perceptual Masking*, Adult ; Age Factors ; Child ; Child, Preschool ; Humans ; Middle Aged ; Noise |
| مستخلص: | The first aim of this study was to obtain a more detailed picture of the effect of masker bandwidth (20 Hz to 1000 Hz bandwidth) on the masking level difference (MLD) for a 500-Hz signal as a function of listener age. The results of the pure-tone signal experiment showed that the MLDs of older children differed from adults only for the narrowest masker bandwidth. In contrast, children younger than about 7 years of age tended to have smaller MLDs than adults at all but the widest masker bandwidth must be for MLDs of adult magnitude to be observed. One interpretation of this effect is that younger listeners require relatively great spectral dissimilarity (and, therefore perceptual dissimilarity) between the signal and masker in order to obtain MLDs of adult magnitude. The second aim of this study was to test this possibility by determining the MLD for noise signals in cases where the signal and masker bandwidths were the same. The results of this experiment showed that the MLDs of children were as large as those of adults when the signal/masker bandwidth was 320 Hz, but were smaller than those of adults when the signal/masker bandwidth was 20 Hz. This indicates that the factor limiting the MLD for narrowband noise in children is related more to the masker bandwidth than to the perceptual similarity between the signal and the masker. |
| معلومات مُعتمدة: | R01-DC00397 United States DC NIDCD NIH HHS |
| تواريخ الأحداث: | Date Created: 19970801 Date Completed: 19971028 Latest Revision: 20190606 |
| رمز التحديث: | 20231215 |
| DOI: | 10.1044/jslhr.4004.955 |
| PMID: | 9263958 |
| قاعدة البيانات: | MEDLINE |
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