Speaking clearly for children with learning disabilities: Sentence perception in noise
Speaking clearly for children with learning disabilities: Sentence perception in noise
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DOI：
10.1044/1092-4388(2003/007
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发表时间：
2003-02-01
影响因子：
2.6
通讯作者：
Hayes, E
中科院分区：
文献类型：
--
作者：
Bradlow, AR;Kraus, N;Hayes, E
本研究比较了有和没有被诊断为学习障碍（LD）的儿童在噪声中的语音感知能力，并调查了自然产生的清晰语音是否会对这些儿童产生感知益处。向一组患有LD的儿童（n = 63）和一组没有LD的儿童（n = 36）对照组呈现嵌入噪音中的简单英语句子。参与者之间存在差异的因素是说话风格（对话与清晰）和信噪比（-4 dB与-8 dB）;参与者之间的谈话者（男性与女性）不同。结果表明，LD组儿童的整体噪音感知比对照组差。此外，随着信噪比的降低，两组的言语感知都较差;然而，与对照组相比，LD儿童受到信噪比降低的不利影响更大。两组都从自然产生的清晰语音中受益匪浅，对于这两组来说，女性说话者比男性说话者引起了更大的清晰语音益处。清晰的语音效益是一致的各组;不需要听众培训;并且，对于大部分LD儿童，足以使他们的表现在控制组的范围内与会话语音。此外，声学比较的对话，以明确的语音修改在两个谈话者提供了洞察自然产生的清晰的语音，这是最重要的，以促进这一人群的可理解性的声学语音特征。
This study compared the speech-in-noise perception abilities of children with and without diagnosed learning disabilities (LDs) and investigated whether naturally produced clear speech yields perception benefits for these children. A group of children with LDs (n = 63) and a control group of children without LDs (n = 36) were presented with simple English sentences embedded in noise. Factors that varied within participants were speaking style (conversational vs. clear) and signal-to-noise ratio (-4 dB vs. -8 dB); talker (male vs. female) varied between participants. Results indicated that the group of children with LDs had poorer overall sentence-in-noise perception than the control group. Furthermore, both groups had poorer speech perception with decreasing signal-to-noise ratio; however, the children with LDs were more adversely affected by a decreasing signal-to-noise ratio than the control group. Both groups benefited substantially from naturally produced clear speech, and for both groups, the female talker evoked a larger clear speech benefit than the male talker. The clear speech benefit was consistent across groups; required no listener training; and, for a large proportion of the children with LDs, was sufficient to bring their performance within the range of the control group with conversational speech. Moreover, an acoustic comparison of conversational-to-clear speech modifications across the two talkers provided insight into the acoustic-phonetic features of naturally produced clear speech that are most important for promoting intelligibility for this population.