Department of Communication Sciences and Disorders, California State University Fullerton, Fullerton, California 92831, USA.
Department of Speech, Language, and Hearing Sciences, University of Connecticut, Storrs, Connecticut 06269, USA.
J Acoust Soc Am. 2022 Aug;152(2):981. doi: 10.1121/10.0013507.
Listeners who use cochlear implants show variability in speech recognition. Research suggests that structured auditory training can improve speech recognition outcomes in cochlear implant users, and a central goal in the rehabilitation literature is to identify factors that maximize training. Here, we examined factors that may influence perceptual learning for noise-vocoded speech in normal hearing listeners as a foundational step towards clinical recommendations. Three groups of listeners were exposed to anomalous noise-vocoded sentences and completed one of three training tasks: transcription with feedback, transcription without feedback, or talker identification. Listeners completed a word transcription test at three time points: immediately before training, immediately after training, and one week following training. Accuracy at test was indexed by keyword accuracy at the sentence-initial and sentence-final position for high and low predictability noise-vocoded sentences. Following training, listeners showed improved transcription for both sentence-initial and sentence-final items, and for both low and high predictability sentences. The training groups showed robust and equivalent learning of noise-vocoded sentences immediately after training. Critically, gains were largely maintained equivalently among training groups one week later. These results converge with evidence pointing towards the utility of non-traditional training tasks to maximize perceptual learning of noise-vocoded speech.
使用人工耳蜗的聆听者在言语识别方面存在差异。研究表明，结构化的听觉训练可以改善人工耳蜗使用者的言语识别效果，康复文献的一个核心目标是确定最大程度提高训练效果的因素。在这里，我们研究了影响正常听力聆听者噪声编码语音感知学习的因素，这是为临床建议奠定基础的重要步骤。三组聆听者接触了异常噪声编码句子，并完成了三种训练任务之一：带反馈的转录、不带反馈的转录或说话人识别。聆听者在三个时间点完成单词转录测试：在训练前、训练后立即和训练后一周。在测试时，通过高和低可预测性噪声编码句子的句子起始和句子结尾的关键字准确性来衡量准确性。训练后，聆听者对句子起始和句子结尾的项目以及低和高可预测性句子的转录都有了明显的提高。训练组在训练后立即表现出对噪声编码句子的强大且等效的学习。至关重要的是，一周后，各训练组的收益基本保持等效。这些结果与指向非传统训练任务对最大化噪声编码语音感知学习的有效性的证据相吻合。
