Spatial Release from Masking in Adults with Bilateral Cochlear Implants: Effects of Distracter Azimuth and Microphone Location

Autor/inn/en	Davis, Timothy J.; Gifford, René H.
Titel	Spatial Release from Masking in Adults with Bilateral Cochlear Implants: Effects of Distracter Azimuth and Microphone Location
Quelle	In: Journal of Speech, Language, and Hearing Research, 61 (2018) 3, S.752-761 (10 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
DOI	10.1044/2017_JSLHR-H-16-0441
Schlagwörter	Assistive Technology; Deafness; Hearing Impairments; Speech Communication; Adults; Stimuli; Human Body + Suchen Sie Ihr Suchwort? Gehörlosigkeit; Taubstummheit; Hearing impairment; Hörbehinderung; Anreizsystem; Menschlicher Körper
Abstract	Purpose: The primary purpose of this study was to derive spatial release from masking (SRM) performance-azimuth functions for bilateral cochlear implant (CI) users to provide a thorough description of SRM as a function of target/distracter spatial configuration. The secondary purpose of this study was to investigate the effect of the microphone location for SRM in a within-subject study design. Method: Speech recognition was measured in 12 adults with bilateral CIs for 11 spatial separations ranging from -90° to +90° in 20° steps using an adaptive block design. Five of the 12 participants were tested with both the behind-the-ear microphones and a T-mic configuration to further investigate the effect of mic location on SRM. Results: SRM can be significantly affected by the hemifield origin of the distracter stimulus--particularly for listeners with interaural asymmetry in speech understanding. The greatest SRM was observed with a distracter positioned 50° away from the target. There was no effect of mic location on SRM for the current experimental design. Conclusion: Our results demonstrate that the traditional assessment of SRM with a distracter positioned at 90° azimuth may underestimate maximum performance for individuals with bilateral CIs. (As Provided).
Anmerkungen	American Speech-Language-Hearing Association. 2200 Research Blvd #250, Rockville, MD 20850. Tel: 301-296-5700; Fax: 301-296-8580; e-mail: slhr@asha.org; Web site: http://jslhr.pubs.asha.org
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01