Journal article
Evaluation of an Adaptive Directional System in a DSP Hearing Aid
American journal of audiology, Vol.13(1), pp.73-79
06/01/2004
DOI: 10.1044/1059-0889(2004/010)
PMID: 15248806
Abstract
The effectiveness of an adaptive directional microphone design, as implemented in the Phonak Claro behind-the-ear hearing aid, is evaluated. Participants were fit bilaterally and tested in 2 environments, an anechoic chamber and a moderately reverberant classroom, with the microphones in the fixed (cardioid) setting and the adaptive setting. Five speakers were placed between 110° and 250° azimuth around the listener. Speech-weighted noise was presented from those speakers at an overall level (OAL) of 65 dB (A). Noise was increased by 8 dB from 1 speaker at a time, using 2-s modulation and random assignment, while the output from the other speakers was reduced to maintain the constant OAL. Results of 2 speech perception tasks used as outcome measures indicated that the adaptive system was not able to follow the dominant noise source in the presence of lower level noise sources. Selfreport measures obtained after blinded home trials were consistent with laboratory findings that the participants did not perceive this adaptive microphone design to be more effective than the default fixed-microphone option.
Details
- Title: Subtitle
- Evaluation of an Adaptive Directional System in a DSP Hearing Aid
- Creators
- Ruth A. Bentler - University of IowaJill L. Tubbs - University of IowaJessica L. M. Egge - University of IowaGregory A. Flamme - University of IowaAndrew B. Dittberner - University of Iowa
- Resource Type
- Journal article
- Publication Details
- American journal of audiology, Vol.13(1), pp.73-79
- DOI
- 10.1044/1059-0889(2004/010)
- PMID
- 15248806
- ISSN
- 1059-0889
- eISSN
- 1558-9137
- Language
- English
- Date published
- 06/01/2004
- Academic Unit
- Communication Sciences and Disorders
- Record Identifier
- 9984383916502771
Metrics
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