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首页> 外文期刊>Ear and hearing. >Effects of Additional Low-Pass-Filtered Speech on Listening Effort for Noise-Band-Vocoded Speech in Quiet and in Noise.
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Effects of Additional Low-Pass-Filtered Speech on Listening Effort for Noise-Band-Vocoded Speech in Quiet and in Noise.

机译：额外的低通滤波语音对安静和噪声中噪声带声语言聆听努力的影响。

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摘要

Residual acoustic hearing in electric-acoustic stimulation (EAS) can benefit cochlear implant (CI) users in increased sound quality, speech intelligibility, and improved tolerance to noise. The goal of this study was to investigate whether the low-pass-filtered acoustic speech in simulated EAS can provide the additional benefit of reducing listening effort for the spectrotemporally degraded signal of noise-band-vocoded speech. Listening effort was investigated using a dual-task paradigm as a behavioral measure, and the NASA Task Load indeX as a subjective self-report measure. The primary task of the dual-task paradigm was identification of sentences presented in three experiments at three fixed intelligibility levels: at near-ceiling, 50%, and 79% intelligibility, achieved by manipulating the presence and level of speech-shaped noise in the background. Listening effort for the primary intelligibility task was reflected in the performance on the secondary, visual response time task. Experimental speech processing conditions included monaural or binaural vocoder, with added low-pass-filtered speech (to simulate EAS) or without (to simulate CI). In Experiment 1, in quiet with intelligibility near-ceiling, additional low-pass-filtered speech reduced listening effort compared with binaural vocoder, in line with our expectations, although not compared with monaural vocoder. In Experiments 2 and 3, for speech in noise, added low-pass-filtered speech allowed the desired intelligibility levels to be reached at less favorable speech-to-noise ratios, as expected. It is interesting that this came without the cost of increased listening effort usually associated with poor speech-to-noise ratios; at 50% intelligibility, even a reduction in listening effort on top of the increased tolerance to noise was observed. The NASA Task Load indeX did not capture these differences. The dual-task results provide partial evidence for a potential decrease in listening effort as a result of adding low-frequency acoustic speech to noise-band-vocoded speech. Whether these findings translate to CI users with residual acoustic hearing will need to be addressed in future research because the quality and frequency range of low-frequency acoustic sound available to listeners with hearing loss may differ from our idealized simulations, and additional factors, such as advanced age and varying etiology, may also play a role.
机译：电声刺激（EAS）中的残留声学听力可以提高耳蜗植入物（CI）用户提高音质，语音清晰度和改善对噪声的耐受性。本研究的目标是调查模拟EAS中的低通滤波声学语音是否可以提供减少噪声频率降级语音的光谱常数劣化信号的听力努力的额外益处。使用双重任务范例作为行为措施来调查聆听努力，以及NASA任务负载指数作为主观自我报告措施。双重任务范式的主要任务是在三个固定理智率水平中鉴定三个实验中的句子：通过操纵言语噪声的存在和水平来实现近天花板，50％和79％的可懂度。背景。主智能性任务的聆听努力反映在辅助视觉响应时间任务的性能中。实验性语音处理条件包括单声道或双耳声探剂，增加了低通滤波的语音（以模拟EAS）或没有（模拟CI）。在实验1中，在近上天花板的可清晰度的安静中，与我们的期望相比，额外的低通滤波语音减少了聆听努力，虽然与单声道声码器没有比较。在实验2和3中，对于噪声的语音，增加了低通滤波的语音，允许以预期的预期以不太有利的语音噪声比达到所需的可清晰度水平。有趣的是，没有增加聆听努力的成本，通常与发言差的噪音比率有关;在50％的理智率下，甚至观察到噪音耐受性增加的聆听努力也减少。 NASA任务负载索引未捕获这些差异。双重任务结果为噪音带声语音添加低频声学演讲，提供了聆听努力的潜在减少的部分证据。这些发现是否转化为具有残留声学听证的CI用户，需要在将来的研究中解决，因为具有听力损失的听众可用的低频声音的质量和频率范围可能与我们的理想化模拟以及其他因素不同，例如高级和不同的病因，也可能发挥作用。

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  • 来源
    《Ear and hearing.》 |2019年第1期|共15页
  • 作者

    Carina Pals; Anastasios Sarampalis; Mart van Dijk; Deniz Ba?kent;

  • 作者单位

    Department of Otorhinolaryngology/Head and Neck Surgery University of Groningen University;

    Department of Experimental Psychology University of Groningen Groningen The Netherlands;

    University of Groningen Graduate School of Medical Sciences Research School of Behavioral and;

    Department of Otorhinolaryngology/Head and Neck Surgery University of Groningen University;

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  • 正文语种 eng
  • 中图分类 耳鼻咽喉科学;
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