Frequency importance functions for words, sentences, and continuous discourse
Frequency importance functions for words, sentences, and continuous discourse
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DOI：
10.1044/jshr.3904.714
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发表时间：
1996-08-01
期刊：
影响因子：
--
通讯作者：
Frank, T
中科院分区：
文献类型：
--
作者：
DePaolis, RA;Janota, CP;Frank, T
本研究确定了频率重要性函数（FIF）的单词，句子，和连续的话语在可比的条件下，使语音的语境效果可以被隔离。一名男性说话者记录了616个单音节词，176个有意义的句子，和44个连续的话语（CD）通道。24名听力正常的参与者对CD段落和句子进行了清晰度估计，并在44个低通和高通滤波和信噪比条件下识别了单词。频率与贡献的可懂度百分比或FIF的曲线图显示，对于所有三种类型的语音，对可懂度贡献最大的频带集中在2000 Hz附近。结果表明，在重要性函数和FIF的形状的统计分析（与峰度的相关措施）的单峰表明，有一个显着的差异，在FIF的形状的基础上的语音类型。数据也被计算到近倍频程带，具有类似的结果。提出的统计分析提供了检验假设的基础：上下文或消息冗余的程度与频带的相对重要性有关。这些发现可能具有临床和预测意义。
This research determined frequency importance functions (FIFs) for words, sentences, and continuous discourse under comparable conditions so that contextual effects of speech could be isolated. A male talker recorded 616 monosyllabic words, 176 meaningful sentences, and 44 continuous discourse (CD) passages. Twenty-four participants with normal hearing made intelligibility estimates of the CD passages and sentences and identified words in each of 44 low- and high-pass filtering and signal-to-noise ratio conditions. Plots of frequency versus percent of contributed intelligibility, or the FIFs, revealed that the frequency band that contributes the most to intelligibility is centered near 2000 Hz for all three types of speech. The results show a single peak in the importance function and a statistical analysis of the shape of the FIF (with kurtosis the pertinent measure) shows that there is a significant difference in the shape of the FIF based upon speech type. The data were also calculated into near-octave bands with similar results. The statistical analysis presented provides the basis for a test of the hypothesis: The degree of context or message redundancy is related to the relative importance of the frequency bands. The findings potentially have clinical as well as predictive implications.