Auditory and auditory-visual frequency-band importance functions for consonant recognition
Auditory and auditory-visual frequency-band importance functions for consonant recognition
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DOI：
10.1121/10.0001301
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发表时间：
2020-05-01
影响因子：
2.4
通讯作者：
Grant, Ken W.
中科院分区：
文献类型：
--
作者：
Bernstein, Joshua G. W.;Venezia, Jonathan H.;Grant, Ken W.
单个频率区域对语音清晰度的相对重要性已经在宽带仅限语音清晰度（AO）条件下牢固确立。然而，言语交流往往是面对面进行的。本研究测试的假设，即在视觉-视觉（AV）条件下，视觉信息是冗余的高频听觉线索，较低的频率区域将增加相对重要性相比，AO条件。辅音的频带重要性函数测定了八个听力受损和四个正常听力的听众。语音被过滤成四个1/3倍频程频带，每个频带由一个倍频程分离，以最大限度地减少能量掩蔽。在每次试验中，从10 dB范围内随机选择每个频段的信噪比（SNR）。AO和AV波段的重要性函数估计使用三个逻辑回归分析：一个主要的模型相关的性能的四个独立的信噪比;控制模型，还包括波段相互作用的条款;和一组不同的四个控制模型，每个检查一个波段的时间。对于这两个听众群体，在AV条件下，低频带的相对重要性增加，与早期使用孤立的语音带的研究一致。所有三种分析都显示了相似的结果，表明不存在跨带相互作用。这些结果表明，AV语音清晰度的准确预测可能需要不同的频率重要性函数比AO条件。
The relative importance of individual frequency regions for speech intelligibility has been firmly established for broadband auditory-only (AO) conditions. Yet, speech communication often takes place face-to-face. This study tested the hypothesis that under auditory-visual (AV) conditions, where visual information is redundant with high-frequency auditory cues, lower frequency regions will increase in relative importance compared to AO conditions. Frequency band-importance functions for consonants were measured for eight hearing-impaired and four normal-hearing listeners. Speech was filtered into four 1/3-octave bands each separated by an octave to minimize energetic masking. On each trial, the signal-to-noise ratio (SNR) in each band was selected randomly from a 10-dB range. AO and AV band-importance functions were estimated using three logistic-regression analyses: a primary model relating performance to the four independent SNRs; a control model that also included band-interaction terms; and a different set of four control models, each examining one band at a time. For both listener groups, the relative importance of the low-frequency bands increased under AV conditions, consistent with earlier studies using isolated speech bands. All three analyses showed similar results, indicating the absence of cross-band interactions. These results suggest that accurate prediction of AV speech intelligibility may require different frequency-importance functions than for AO conditions.