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- W2396985678 abstract "Bilateral contralateral routing of signals (BiCROS) hearing aids function to restore audibility of sounds originating from the side of the unaidable ear. However, when speech is presented to the side of the aidable ear and noise to the side of the unaidable ear, a BiCROS arrangement may reduce intelligibility of the speech signal. This negative effect may be circumvented if an on/off switch is available on the contralateral routing of signals (CROS) transmitter.This study evaluated if the proper use of the on/off switch on a CROS transmitter could enhance speech recognition in noise and sound localization abilities. The participants' subjective reactions to the use of the BiCROS, including the use of the on/off switch in real-life were also evaluated.A between-subjects, repeated-measures design was used to assess differences in speech recognition (in quiet and in noise) and localization abilities under four hearing aid conditions (unaided, unilaterally aided, fixed BiCROS setting, and adjusted BiCROS setting) with speech and noise stimuli presented from different azimuths. Participants were trained on the use of the on/off switch on the BiCROS transmitter before testing in the adjusted BiCROS settings. Subjective ratings were obtained with the Speech, Spatial, and Sound Quality (SSQ) questionnaire and a custom questionnaire.Nine adult BiCROS candidates participated in this study.Participants wore the Widex Dream-m-CB hearing aid on the aidable ear for 1 week. They then wore the BiCROS for the remainder of the study. Speech recognition and localization testing were completed in four hearing aid conditions (unaided, unilateral aided, fixed BiCROS, and adjusted BiCROS). Speech recognition was evaluated during the first three visits, whereas localization was evaluated over the course of the study. Participants completed the SSQ questionnaire before each visit. The CROS questionnaire was completed at the final visit. A repeated measures analysis of variance with Bonferroni post hoc analysis was used to evaluate the significance of the results on speech recognition, localization, and the SSQ.The results revealed that the adjusted BiCROS condition improved speech recognition scores by 20 rau (rationalized arcsine unit) when speech was presented to the aidable ear and localization by 37% when sounds are presented from the side of the unaidable ear over the fixed BiCROS condition. Statistically significant benefit on the SSQ was also noted with the adjusted BiCROS condition compared to the unilateral fitting.These findings supported the value of an on/off switch on a CROS transmitter because it allows convenient selective transmission of sounds. It also highlighted the importance of instructions and practice in using the BiCROS hearing aid successfully." @default.
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- W2396985678 date "2015-05-01" @default.
- W2396985678 modified "2023-09-24" @default.
- W2396985678 title "Effects of Training on the Use of a Manual Microphone Shutoff on a BiCROS Device" @default.
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- W2396985678 doi "https://doi.org/10.3766/jaaa.14090" @default.
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