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Speech recognition in noise using bilateral open-fit hearing aids: the limited benefit of directional microphones and noise reduction.
Int J Audiol. 2013 Jan; 52(1):29-36.IJ

Abstract

OBJECTIVE

To investigate speech recognition performance in noise with bilateral open-fit hearing aids and as reference also with closed earmolds, in omnidirectional mode, directional mode, and directional mode in conjunction with noise reduction.

DESIGN

A within-subject design with repeated measures across conditions was used. Speech recognition thresholds in noise were obtained for the different conditions.

STUDY SAMPLE

Twenty adults without prior experience with hearing aids. All had symmetric sensorineural mild hearing loss in the lower frequencies and moderate to severe hearing loss in the higher frequencies.

RESULTS

Speech recognition performance in noise was not significantly better with an omnidirectional microphone compared to unaided, whereas performance was significantly better with a directional microphone (1.6 dB with open fitting and 4.4 dB with closed earmold) compared to unaided. With open fitting, no significant additional advantage was obtained by combining the directional microphone with a noise reduction algorithm, but with closed earmolds a significant additional advantage of 0.8 dB was obtained.

CONCLUSIONS

The significant, though limited, advantage of directional microphones and the absence of additional significant improvement by a noise reduction algorithm should be considered when fitting open-fit hearing aids.

Authors+Show Affiliations

Department of Audiology, Sahlgrenska University Hospital, Gothenburg, Sweden. lennart.magnusson@neuro.gu.seNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22928919

Citation

Magnusson, Lennart, et al. "Speech Recognition in Noise Using Bilateral Open-fit Hearing Aids: the Limited Benefit of Directional Microphones and Noise Reduction." International Journal of Audiology, vol. 52, no. 1, 2013, pp. 29-36.
Magnusson L, Claesson A, Persson M, et al. Speech recognition in noise using bilateral open-fit hearing aids: the limited benefit of directional microphones and noise reduction. Int J Audiol. 2013;52(1):29-36.
Magnusson, L., Claesson, A., Persson, M., & Tengstrand, T. (2013). Speech recognition in noise using bilateral open-fit hearing aids: the limited benefit of directional microphones and noise reduction. International Journal of Audiology, 52(1), 29-36. https://doi.org/10.3109/14992027.2012.707335
Magnusson L, et al. Speech Recognition in Noise Using Bilateral Open-fit Hearing Aids: the Limited Benefit of Directional Microphones and Noise Reduction. Int J Audiol. 2013;52(1):29-36. PubMed PMID: 22928919.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Speech recognition in noise using bilateral open-fit hearing aids: the limited benefit of directional microphones and noise reduction. AU - Magnusson,Lennart, AU - Claesson,Ann, AU - Persson,Maria, AU - Tengstrand,Tomas, Y1 - 2012/08/29/ PY - 2012/8/30/entrez PY - 2012/8/30/pubmed PY - 2013/5/31/medline SP - 29 EP - 36 JF - International journal of audiology JO - Int J Audiol VL - 52 IS - 1 N2 - OBJECTIVE: To investigate speech recognition performance in noise with bilateral open-fit hearing aids and as reference also with closed earmolds, in omnidirectional mode, directional mode, and directional mode in conjunction with noise reduction. DESIGN: A within-subject design with repeated measures across conditions was used. Speech recognition thresholds in noise were obtained for the different conditions. STUDY SAMPLE: Twenty adults without prior experience with hearing aids. All had symmetric sensorineural mild hearing loss in the lower frequencies and moderate to severe hearing loss in the higher frequencies. RESULTS: Speech recognition performance in noise was not significantly better with an omnidirectional microphone compared to unaided, whereas performance was significantly better with a directional microphone (1.6 dB with open fitting and 4.4 dB with closed earmold) compared to unaided. With open fitting, no significant additional advantage was obtained by combining the directional microphone with a noise reduction algorithm, but with closed earmolds a significant additional advantage of 0.8 dB was obtained. CONCLUSIONS: The significant, though limited, advantage of directional microphones and the absence of additional significant improvement by a noise reduction algorithm should be considered when fitting open-fit hearing aids. SN - 1708-8186 UR - https://www.unboundmedicine.com/medline/citation/22928919/Speech_recognition_in_noise_using_bilateral_open_fit_hearing_aids:_the_limited_benefit_of_directional_microphones_and_noise_reduction_ L2 - https://www.tandfonline.com/doi/full/10.3109/14992027.2012.707335 DB - PRIME DP - Unbound Medicine ER -