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How directional microphones affect speech recognition, listening effort and localisation for listeners with moderate-to-severe hearing loss.
Int J Audiol. 2017 12; 56(12):909-918.IJ

Abstract

OBJECTIVE

The purpose of this study was to evaluate the effects of directional microphone use on laboratory measures of sentence recognition, listening effort and localisation. An additional purpose of this study was to evaluate the effects of asymmetric directional microphone use on the same laboratory measures.

DESIGN

Three hearing aid conditions were evaluated: (1) bilateral omnidirectional microphones, (2) bilateral directional microphones and (3) asymmetric microphones (directional microphone for only one hearing aid). Sentence recognition performance was evaluated using a connected speech test. Listening effort was evaluated using a dual-task paradigm with a response time-based secondary task requiring word categorisation. Localisation was examined using a complex task requiring localisation and recall of speech originating from one of four loudspeakers in the horizontal plane (-60°, -45°, +45°, +60°).

STUDY SAMPLE

Eighteen adults (M = 61.8 years) with symmetrical, moderate-to-severe hearing loss participated.

RESULTS

Performance on each task was analysed separately using a repeated measures analysis of variance. Results revealed directional benefits for sentence recognition and listening effort, but microphone setting did not affect localisation. Performance was equivalent with symmetric and asymmetric directional configurations.

CONCLUSIONS

Bilateral and asymmetric directional microphone configurations equally improved sentence recognition and listening effort; neither affected localisation or recall.

Authors+Show Affiliations

a Department of Hearing and Speech Sciences , Vanderbilt University Medical Center , Nashville , TN , USA.a Department of Hearing and Speech Sciences , Vanderbilt University Medical Center , Nashville , TN , USA.

Pub Type(s)

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

Language

eng

PubMed ID

28738747

Citation

Picou, Erin M., and Todd A. Ricketts. "How Directional Microphones Affect Speech Recognition, Listening Effort and Localisation for Listeners With Moderate-to-severe Hearing Loss." International Journal of Audiology, vol. 56, no. 12, 2017, pp. 909-918.
Picou EM, Ricketts TA. How directional microphones affect speech recognition, listening effort and localisation for listeners with moderate-to-severe hearing loss. Int J Audiol. 2017;56(12):909-918.
Picou, E. M., & Ricketts, T. A. (2017). How directional microphones affect speech recognition, listening effort and localisation for listeners with moderate-to-severe hearing loss. International Journal of Audiology, 56(12), 909-918. https://doi.org/10.1080/14992027.2017.1355074
Picou EM, Ricketts TA. How Directional Microphones Affect Speech Recognition, Listening Effort and Localisation for Listeners With Moderate-to-severe Hearing Loss. Int J Audiol. 2017;56(12):909-918. PubMed PMID: 28738747.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - How directional microphones affect speech recognition, listening effort and localisation for listeners with moderate-to-severe hearing loss. AU - Picou,Erin M, AU - Ricketts,Todd A, Y1 - 2017/07/25/ PY - 2017/7/26/pubmed PY - 2018/7/10/medline PY - 2017/7/26/entrez KW - Hearing aids KW - cognition KW - hearing loss KW - listening effort KW - localisation KW - noise KW - rehabilitation KW - speech perception SP - 909 EP - 918 JF - International journal of audiology JO - Int J Audiol VL - 56 IS - 12 N2 - OBJECTIVE: The purpose of this study was to evaluate the effects of directional microphone use on laboratory measures of sentence recognition, listening effort and localisation. An additional purpose of this study was to evaluate the effects of asymmetric directional microphone use on the same laboratory measures. DESIGN: Three hearing aid conditions were evaluated: (1) bilateral omnidirectional microphones, (2) bilateral directional microphones and (3) asymmetric microphones (directional microphone for only one hearing aid). Sentence recognition performance was evaluated using a connected speech test. Listening effort was evaluated using a dual-task paradigm with a response time-based secondary task requiring word categorisation. Localisation was examined using a complex task requiring localisation and recall of speech originating from one of four loudspeakers in the horizontal plane (-60°, -45°, +45°, +60°). STUDY SAMPLE: Eighteen adults (M = 61.8 years) with symmetrical, moderate-to-severe hearing loss participated. RESULTS: Performance on each task was analysed separately using a repeated measures analysis of variance. Results revealed directional benefits for sentence recognition and listening effort, but microphone setting did not affect localisation. Performance was equivalent with symmetric and asymmetric directional configurations. CONCLUSIONS: Bilateral and asymmetric directional microphone configurations equally improved sentence recognition and listening effort; neither affected localisation or recall. SN - 1708-8186 UR - https://www.unboundmedicine.com/medline/citation/28738747/How_directional_microphones_affect_speech_recognition_listening_effort_and_localisation_for_listeners_with_moderate_to_severe_hearing_loss_ L2 - https://www.tandfonline.com/doi/full/10.1080/14992027.2017.1355074 DB - PRIME DP - Unbound Medicine ER -