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KMID : 0361020230660090584
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Korean Journal of Otolaryngology - Head and Neck Surgery
2023 Volume.66 No. 9 p.584 ~ p.590
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A Feasible Sound Field Measurement in ENT Clinics for Contralateral Routing of Signals Hearing Aids: A Pilot Study
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Han Jae-Sang
Kim Yeon-Ji
Hwang Eul-Seung
Lim Ji-Hyung
Park So-Young
Park Jeong-Hae
Seo Jae-Hyun
Park Shi-Nae
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Abstract
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Background and Objectives The hearing in noise test (HINT) or sound localization test(SLT) is used as the standardized assessment for contralateral routing of signals (CROS) andbilateral microphones with contralateral routing of signals (BiCROS) hearing aids (HAs).
However, implementing HINT or SLT can be challenging in most ENT clinics. In this study,we propose a new feasible method specifically designed for conducting a sound field hearingtest for CROS and BiCROS HA users.
Subjects and Method CROS/BiCROS HA users who visited Seoul St. Mary’s hospital be-tween 2019 and 2021 were enrolled for the study. SLT was conducted in a sound-proof roomequipped with two speakers positioned at a 45° angle from the patient on each side: noise stim-uli were presented to the better ear the headphone patient was wearing while signals were pre-sented to the worse ear via the speakers in the room. To validate the sound field test, a correla-tion analysis was conducted using the Bern benefit in single-sided deafness and the Koreanversion of the International Outcome Inventory for Hearing Aids (K-IOI-HA) Questionnaires.
Results The aided speech discrimination score was significantly higher in the signal 60 dBHL/masking 50 dB HL condition than 50 dB HL/masking 50 dB HL condition ( p<0.05). Asignificant correlation was found between the gain of sound field speech audiometry and theK-IOI-HA questionnaire ( p<0.05).
Conclusion Our novel sound field hearing test for CROS/BiCROS HA users, which pres-ents appropriate noise stimuli via headphones to the better ear, appears to be a feasible ap-proach for CROS/BiCROS HA users.
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KEYWORD
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Hearing aids, Hearing loss, unilateral, Hearing test
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