Caregivers modify their speech when talking to infants, a specific type of speech known as infant-directed speech (IDS). This speaking style facilitates language learning compared to adult-directed speech (ADS) in infants with normal hearing (NH). While infants with NH and those with cochlear implants (CIs) prefer listening to IDS over ADS, it is yet unknown how CI processing may affect the acoustic distinctiveness between ADS and IDS, as well as the degree of intelligibility of these. This study analyzed speech of seven female adult talkers to model the effects of simulated CI processing on (1) acoustic distinctiveness between ADS and IDS, (2) estimates of intelligibility of caregivers’ speech in ADS and IDS, and (3) individual differences in caregivers’ ADS-to-IDS modification and estimated speech intelligibility. Results suggest that CI processing is substantially detrimental to the acoustic distinctiveness between ADS and IDS, as well as to the intelligibility benefit derived from ADS-to-IDS modifications. Moreover, the observed variability across individual talkers in acoustic implementation of ADS-to-IDS modification and the estimated speech intelligibility was significantly reduced due to CI processing. The findings are discussed in the context of the link between IDS and language learning in infants with CIs.

照顾者在与婴儿交谈时会修改他们的言语，这是一种称为婴儿导向言语 (IDS) 的特定类型的言语。与听力正常的婴儿 (NH) 的成人定向语音 (ADS) 相比，这种说话方式有助于语言学习。虽然患有 NH 的婴儿和植入人工耳蜗 (CI) 的婴儿更喜欢听 IDS 而不是 ADS，但目前尚不清楚 CI 处理如何影响 ADS 和 IDS 之间的声学​​独特性，以及它们的可理解程度。本研究分析了七名成年女性说话者的语音，以模拟模拟 CI 处理对 (1) ADS 和 IDS 之间的声学​​独特性、(2) 护理人员在 ADS 和 IDS 中的语音可理解性的估计以及 (3) 个体差异的影响。护理人员的 ADS-to-IDS 修改和估计的语音清晰度。结果表明，CI 处理对 ADS 和 IDS 之间的声学​​独特性以及 ADS-to-IDS 修改所带来的可理解性收益是非常不利的。此外，由于 CI 处理，在 ADS 到 IDS 修改的声学实施中观察到的个体谈话者之间的变异性和估计的语音清晰度显着降低。这些发现在 IDS 与 CI 婴儿语言学习之间的联系的背景下进行了讨论。在 ADS 到 IDS 修改的声学实施中观察到的个体说话者之间的变异性和估计的语音清晰度由于 CI 处理而显着降低。这些发现在 IDS 与 CI 婴儿语言学习之间的联系的背景下进行了讨论。在 ADS 到 IDS 修改的声学实施中观察到的个体说话者之间的变异性和估计的语音清晰度由于 CI 处理而显着降低。这些发现在 IDS 与 CI 婴儿语言学习之间的联系的背景下进行了讨论。