Intelligibility in speech maskers with a binaural cochlear implant sound coding strategy inspired by the contralateral medial olivocochlear reflex
Intelligibility in speech maskers with a binaural cochlear implant sound coding strategy inspired by the contralateral medial olivocochlear reflex
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DOI：
10.1016/j.heares.2017.02.003
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发表时间：
2017-05-01
期刊：
影响因子：
2.8
通讯作者：
Wilson, Blake S.
中科院分区：
文献类型：
--
作者：
Lopez-Poveda, Enrique A.;Eustaquio-Martin, Almudena;Wilson, Blake S.
我们最近提出了一种受对侧内侧橄榄耳蜗反射（MOC 策略）启发的双耳人工耳蜗 (CI) 声音处理策略，并表明它可以提高稳态噪声的清晰度 (Lopez-Poveda et al., 2016, Ear Hear 37:e138-e148)。这里的目的是评估 MOC 策略对于语音掩蔽器（一种更自然的干扰源）可能的语音接收优势。使用 MOC 策略和标准 (STD) 策略测量了 6 个双侧和 2 个单侧耳聋 CI 用户的言语接收阈值 (SRT)。 SRT 是在单侧和双侧聆听条件下测量的，目标刺激和掩蔽刺激位于 (0, 0)、(-15 度、+15 度) 和 (-90 度、+90 度) 方位角。对于空间上分离的目标和掩蔽源，MOC 的平均 SRT 比 STD 策略高 2-5 dB。对于双边 CI 用户，MOC 策略 (1) 在单边和双边聆听条件下与空间分离的语音掩蔽器竞争，促进了语音的清晰度； (2) 导致两种聆听条件下掩蔽空间释放的整体改善。由于语音是一种比稳态噪声更自然的干扰源，目前的结果表明 MOC 策略有可能为 CI 用户带来有希望的结果。 (C) 2017 年由 Elsevier B.V. 出版
We have recently proposed a binaural cochlear implant (CI) sound processing strategy inspired by the contralateral medial olivocochlear reflex (the MOC strategy) and shown that it improves intelligibility in steady-state noise (Lopez-Poveda et al., 2016, Ear Hear 37:e138-e148). The aim here was to evaluate possible speech-reception benefits of the MOC strategy for speech maskers, a more natural type of interferer. Speech reception thresholds (SRTs) were measured in six bilateral and two single-sided deaf CI users with the MOC strategy and with a standard (STD) strategy. SRTs were measured in unilateral and bilateral listening conditions, and for target and masker stimuli located at azimuthal angles of (0, 0), (-15 degrees, +15 degrees), and (-90 degrees, +90 degrees). Mean SRTs were 2-5 dB better with the MOC than with the STD strategy for spatially separated target and masker sources. For bilateral CI users, the MOC strategy (1) facilitated the intelligibility of speech in competition with spatially separated speech maskers in both unilateral and bilateral listening conditions; and (2) led to an overall improvement in spatial release from masking in the two listening conditions. Insofar as speech is a more natural type of interferer than steady-state noise, the present results suggest that the MOC strategy holds potential for promising outcomes for CI users. (C) 2017 Published by Elsevier B.V.