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首页> 美国卫生研究院文献>The Journal of the Acoustical Society of America >The perception of emotion and focus prosody with varying acoustic cues in cochlear implant simulations with varying filter slopes
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The perception of emotion and focus prosody with varying acoustic cues in cochlear implant simulations with varying filter slopes

机译：在具有不同滤波器斜率的人工耳蜗仿真中具有不同声音提示的情绪和焦点韵律的感知

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This study aimed to find the optimal filter slope for cochlear implant simulations (vocoding) by testing the effect of a wide range of slopes on the discrimination of emotional and linguistic (focus) prosody, with varying availability of F0 and duration cues. Forty normally hearing participants judged if (non-)vocoded sentences were pronounced with happy or sad emotion, or with adjectival or nominal focus. Sentences were recorded as natural stimuli and manipulated to contain only emotion- or focus-relevant segmental duration or F0 information or both, and then noise-vocoded with 5, 20, 80, 120, and 160 dB/octave filter slopes. Performance increased with steeper slopes, but only up to 120 dB/octave, with bigger effects for emotion than for focus perception. For emotion, results with both cues most closely resembled results with F0, while for focus results with both cues most closely resembled those with duration, showing emotion perception relies primarily on F0, and focus perception on duration. This suggests that filter slopes affect focus perception less than emotion perception because for emotion, F0 is both more informative and more affected. The performance increase until extreme filter slope values suggests that much performance improvement in prosody perception is still to be gained for CI users.
机译：这项研究的目的是通过测试各种斜率对情绪和语言（焦点）韵律的辨别作用（具有不同的F0和持续时间提示）来找到用于人工耳蜗仿真（语音编码）的最佳滤波器斜率。四十名正常听力的参与者判断（非）语音句子的发音是高兴还是悲伤，还是形容词或名词性重点。句子被记录为自然刺激，并被处理为仅包含与情感或焦点相关的片段持续时间或F0信息或两者，然后以5、20、80、120和160 dB /倍频程滤波器的斜率对语音进行声码处理。随着斜率的提高，性能会提高，但最高可达120 dB /倍频程，对情感的影响要比对焦点感知的影响大。对于情感，两个提示的结果与F0的结果最相似，而对于焦点提示，两个提示的结果与持续时间的结果最相似，这表明情绪感知主要依赖于F0，而焦点感知则取决于持续时间。这表明滤镜斜率对焦点知觉的影响比对情绪知觉的影响小，因为对于情绪而言，F0不仅信息量更大，而且影响更大。性能提高直到极端的滤波器斜率值表明，CI用户仍需要获得很大的韵律感知性能改进。

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