Effect of hearing aid bandwidth on speech recognition performance of listeners using a cochlear implant and contralateral hearing aid (bimodal hearing).
Effect of hearing aid bandwidth on speech recognition performance of listeners using a cochlear implant and contralateral hearing aid (bimodal hearing).
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DOI：
10.1097/aud.0b013e31828e86e8
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发表时间：
2013-09
期刊：
影响因子：
3.7
通讯作者：
Svirsky MA
中科院分区：
文献类型：
--
作者：
Neuman AC;Svirsky MA
本研究的目的是确定助听器（HA）装配的带宽如何影响一只耳朵植入人工耳蜗（CI），未植入耳朵重度至极重度听力损失（但剩余听力足以使用NAL-RP规定指南进行宽带放大;通过2000 Hz，无辅助阈值不低于95 dB HL）的听者的双峰语音识别。在安静和噪声中的句子材料的识别被测量与CI单独和与CI加HA的放大由助听器提供的在高和中频区域被系统地减少从宽带条件（NAL-RP处方）。修改后的带宽包括2，000、1，000或500 Hz的频率上限。平均而言，当助听器在所有频率下提供放大且残余听力无变化时，可获得显著的双峰益处。将助听器带宽限制为仅低频放大（低于1000 Hz）并不能显著改善单独使用CI的听力性能。这些数据表明，在双峰用户使用的助听器中，在听力阈值允许的频率范围内提供放大的重要性。
The purpose of this study was to determine how the bandwidth of the hearing aid (HA) fitting affects bimodal speech recognition of listeners with a cochlear implant (CI) in one ear and severe-to-profound hearing loss in the unimplanted ear (but with residual hearing sufficient for wideband amplification using NAL-RP prescriptive guidelines; unaided thresholds no poorer than 95 dB HL through 2000 Hz). Recognition of sentence material in quiet and in noise was measured with the CI alone and with CI plus HA as the amplification provided by the hearing aid in the high and mid-frequency regions was systematically reduced from the wideband condition (NAL-RP prescription). Modified bandwidths included upper frequency cutoffs of 2,000, 1,000 or 500 Hz. On average, significant bimodal benefit was obtained when the hearing aid provided amplification at all frequencies with aidable residual hearing. Limiting the hearing aid bandwidth to only low frequency amplification (below 1000 Hz) did not yield significant improvements in performance over listening with the CI alone. These data suggest the importance of providing amplification across as wide a frequency region as permitted by audiometric thresholds in the hearing aid used by bimodal users.