This study investigated the binaural benefits and spatial release from masking of group and intra-participant comparisons in Mandarin Chinese-speaking preschool children with binaural hearing aids and bimodal fitting cochlear implants, and explored the relationship between hearing audibility and speech-recognition-in-noise performance. Participants (2.9-7.5 years) were tested using the Mandarin Spoken Word-Picture IDentification Test (Adaptive version) to yield the adaptive signal-to-noise ratio for a 50% correct score as the outcome measure. The speech stimuli were presented from the 0° azimuth, and the noise was presented from the 0, +90, and −90° azimuths. Furthermore, the participants were tested under monaural- and binaural-aided hearing conditions. The participants with a binaural-fitted hearing aid significantly benefited from binaural redundancy, head-shadow and achieved a significant spatial release from masking with a monaural left hearing aid when the noise moved from the front to the right. In contrast, the participants with a bimodal-fitted hearing aid significantly benefited from binaural redundancy, binaural squelch, and head-shadow and achieved a significant spatial release from masking with a monaural cochlear implant and a bimodal-fitted hearing aid when the noise moved from the front to the hearing-aid side. Although the speech intelligibility index obtained from the monaural hearing aids could predict the speech-recognition-in-noise performance of the participants with the monaural-fitted hearing aid, the same obtained from the monaural cochlear implants could not predict the speech-recognition-in-noise performance of the participants with the monaural-fitted cochlear implant. The Mandarin Spoken Word-Picture IDentification Test (Adaptive version) is a powerful and efficient tool for assessing the speech-recognition-in-noise performance of children in clinical settings and binaural-aided hearing is important for obtaining binaural and spatial benefits that could maximise the potential speech-recognition-in-noise performance of children with bilateral hearing loss. All rights reserved.
|Qualification||Doctor of Philosophy|
|Publication status||Published - 2021|
- Speech recognition in noise
- Binaural benefit
- Spatial release from masking
- Hearing aid
- Cochlear implant
- Theses and Dissertations
- Thesis (Ph.D.)--The Education University of Hong Kong, 2021.