Universität zu Köln

Raehlmann, S. and Meister, H. (2017). Speech audiometric assessment of informational masking. German version. HNO, 65 (3). S. 228 - 237. NEW YORK: SPRINGER. ISSN 1433-0458

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Abstract

Background. In communication situations with multiple speakers, speech recognition is adversely affected by energetic masking (EM) and informational masking (IM). IM characterizes masking effects caused by irrelevant information from competing speakers. This work investigates an approach to assess IM based on the Oldenburg Sentence Test (OLSa). Furthermore, the influence of interaural time differences (ITD) and aging effects on IM are considered. Materials and methods. IM was measured by superimposing two sentences from the OLSa. The beginning of the target sentence was indicated by the keyword Stefan. To segregate between target and masker sentences, ITDs from 50 to 400 mu s were included. The participants were asked to selectively attend to the target sentence and repeat back the spoken words. Potential factors associated with speech recognition results were assessed by an auditory measure of temporal fine structure and a neuropsychological profile. 16 normal-hearing listeners between 18 and 77 years of age participated in the study. Results. Despite the clinically normal-hearing participants, the analysis showed a significant relationship between speech recognition outcome and pure-tone thresholds. All participants benefited from small ITDs between the target and masker sentence with regard to the unmasking of IM. The magnitude of unmasking could not be explained by any of the factors assessed in this study. Error analysis and the comparison to the literature reveal that the OLSa could be a useful tool to assess IM. Also in line with the current literature is the relationship between speech recognition outcome and pure-tone thresholds, as well as the strong effect of ITDs on the release from IM. Conclusion. Speech audiometric assessment of IM is of high relevance with regard to everyday communication situations. Due to its structure, the OLSa seems to be a useful tool for determining IM.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Raehlmann, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Meister, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-237669
DOI:	10.1007/s00106-016-0303-y
Journal or Publication Title:	HNO
Volume:	65
Number:	3
Page Range:	S. 228 - 237
Date:	2017
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1433-0458
Language:	German
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language COCKTAIL-PARTY PROBLEM; HEARING-LOSS; OLDER-ADULTS; RECOGNITION; LISTENERS; INTELLIGIBILITY; IMPAIRMENT; TALKER; AGE; YOUNG Multiple languages Otorhinolaryngology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23766