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ERIC Number: EJ1043559
Record Type: Journal
Publication Date: 2014-Oct
Pages: 19
Abstractor: As Provided
ISSN: ISSN-1092-4388
Head Shadow, Squelch, and Summation Effects with an Energetic or Informational Masker in Bilateral and Bimodal CI Users
Pyschny, Verena; Landwehr, Markus; Hahn, Moritz; Lang-Roth, Ruth; Walger, Martin; Meister, Hartmut
Journal of Speech, Language, and Hearing Research, v57 n5 p1942-1960 Oct 2014
Purpose: The objective of the study was to investigate the influence of noise (energetic) and speech (energetic plus informational) maskers on the head shadow (HS), squelch (SQ), and binaural summation (SU) effect in bilateral and bimodal cochlear implant (CI) users. Method: Speech recognition was measured in the presence of either a competing talker or modulated speech-shaped noise in 10 bimodal and 10 bilateral adult CI users. HS, SQ, and SU effects were calculated. The interfering signals were manipulated with respect to F0 to consider the influence of different speaker voices. Results: The effects HS, SQ, and SU differed depending on the type of masker. A detailed analysis of errors was used to dissociate energetic and informational masking effects. The analysis showed a release from energetic than from informational masking. Conclusion: Noise interferers are not sufficient to reflect difficulties experienced with speech understanding in noise for bilateral and bimodal CI users.
American Speech-Language-Hearing Association (ASHA). 10801 Rockville Pike, Rockville, MD 20852. Tel: 800-638-8255; Fax: 301-571-0457; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A