Effect of hearing aid bandwidth on speech recognition performance of listeners using a cochlear implant and contralateral hearing aid (bimodal hearing).

摘要: Objectives The purpose of this study was to determine how the bandwidth hearing aid (HA) fitting affects bimodal speech recognition listeners with a cochlear implant (CI) in one ear and severe-to-profound loss unimplanted (but residual sufficient for wideband amplification using National Acoustic Laboratories Revised, Profound [NAL-RP] prescriptive guidelines; unaided thresholds no poorer than 95 dB HL through 2000 Hz). Design Recognition sentence material quiet noise measured CI alone plus HA as provided by high mid-frequency regions systematically reduced from condition (NAL-RP prescription). Modified bandwidths included upper frequency cutoffs 2000, 1000, or 500 Hz. Results On average, significant benefit obtained when at all frequencies aidable hearing. Limiting only low-frequency (below 1000 Hz) did not yield improvements performance over listening alone. Conclusions These data suggest importance providing across wide region permitted audiometric used users.