听力损失儿童言语的可理解性:助听器的传统扩音与非线性频率压缩

T. Ching, Nan Xu Rattanasone, Gretel Macdonald, Vicky W. Zhang, Laura Button, K. Demuth
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引用次数: 3

摘要

目的:本研究旨在1)探讨助听器中非线性频率压缩(NLFC)对听力损失儿童言语清晰度的影响;2)检查临床医生或父母的判断是否可能与没有经验的听众的判断相关。方法:要求27名听力正常的成年听众在四种辅助条件下对8名听障儿童的语音样本的可理解性进行判断。此外,父母和为孩子提供服务的临床医生也提供了评分。这些儿童参加了一项为期四期的多地点试验,旨在比较助听器中传统处理与NLFC处理对儿童表现的影响。在那项研究中,孩子们对四种助听器设置中的每一种都熟悉了至少六周,然后通过一系列测试对他们进行评估,其中包括20个句子的生成。本研究使用记录的句子作为可理解性判断的刺激。每个听众听两个说话者说的句子,每个说话者说40个句子。这些刺激通过耳机以65分贝的声级呈现给听者。4名儿童谈话者得到了8名听众的评价,4名得到了7名听众的评价。结果:小组水平的结果表明,当儿童使用NLFC时,没有经验的听者的语音清晰度评分高于没有经验的听者。三名儿童说话者在NLFC激活方面表现出显著的优势。这些结果与个别说话者的助听器估计的可听带宽一致。在没有经验的听者和临床医生之间发现了显著的正相关,但与父母的评分都不相关。结论:平均而言,使用NLFC可以提高没有经验的听者对儿童讲话的可理解性。临床医生对儿童言语产生的判断是评估儿童扩音效果的临床可行工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Intelligibility of Speech Produced by Children with Hearing Loss: Conventional Amplification versus Nonlinear Frequency Compression in Hearing Aids
Objective: This study aimed to 1) investigate the influence of nonlinear frequency compression (NLFC) in hearing aids on intelligibility of speech produced by children with hearing loss; and 2) examine whether clinicians’ or parents’ judgments might be correlated with those of inexperienced listeners. Methods: Twenty-seven adult listeners with normal hearing who reported no experience listening to speech produced by people with hearing loss were asked to judge the intelligibility of speech samples of eight hearingimpaired children under four aided conditions. Also, the parents and the clinicians who provided services to the children provided ratings. The children were enrolled in a four-period multi-site trial that was aimed to compare the effects of conventional processing with NLFC in hearing aids on children’s performance. In that study, the children were familiarized with each of four hearing-aid setting for at least six weeks before they were evaluated using a range of tests, including the production of 20 sentences. The current study used the recorded sentences as stimuli for intelligibility judgments. Each listener heard sentences produced by two child-talkers, 40 from each talker. The stimuli were presented to listeners at 65 dB SPL via headphones. Four child-talkers received ratings from eight listeners and four from seven listeners. Results: Group-level results indicate that speech intelligibility was rated to be better by inexperienced listeners when children used NLFC than when they did not. Three child-talkers showed a significant advantage with NLFC activation. These results are consistent with the estimated audible bandwidth of hearing aids for individual talkers. Significant positive correlations for intelligibility ratings between inexperienced listeners and clinicians were found, but neither correlated with ratings from parents. Conclusions: The use of NLFC improved intelligibility of speech produced by children, on average, as rated by inexperienced listeners. Clinicians’ judgment of children’s speech production is a clinically viable tool for evaluating the effectiveness of amplification for children.
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