Audiological and subjective benefit with a new adhesive bone conduction hearing aid in children with congenital unilateral microtia and atresia.

Abstract

This study aimed to evaluate the audiological benefits and subjective satisfaction in using a new adhesive bone conduction hearing aid in children with congenital unilateral microtia and atresia. We evaluated the effectiveness of the hearing aid using the sound field hearing threshold, speech recognition ability under quiet and noise, and subjective questionnaires in 13 children (5-15years old). The mean sound field hearing threshold significantly improved with a gain of 25.4 ± 4.9dB HL. Mean word recognition scores were ameliorated in quiet and noise by 1.9 ± 2.5% and 7.3 ± 5.3%, respectively. Speech recognition ability results in noise varied; when the speech signal and noise were presented from the front, the mean speech recognition ability improved by 2.5 ± 1.6dB signal-to-noise ratios (SNR). When noise was presented towards the normal hearing side, speech understanding was improved by 2.9 ± 1.6dB SNR. When the speech signal was presented from the atretic side with noise from the normal hearing side, an improvement of 5.7 ± 3.4dB SNR (p < 0.001) was noted. However, when noise was presented towards the newly aided atretic ear, no statistical significance was found. The questionnaire results indicated that the hearing device provided benefits in speech recognition ability in different complex situations, with high satisfaction rates. The adhesive bone conduction hearing aid investigated here offers a concealed and aesthetic method to improve hearing in children with congenital unilateral microtia and atresia during their early years, with high subjective satisfaction.