Perception of aperiodicity in pathological voice
Perception of aperiodicity in pathological voice
复制标题
DOI：
10.1121/1.1858351
复制
发表时间：
2005-04-01
影响因子：
2.4
通讯作者：
Gerratt, BR
中科院分区：
文献类型：
--
作者：
Kreiman, J;Gerratt, BR
虽然抖动、闪烁和噪声是所有声音信号的声学特征，但它们在自然产生的病理声音中的感知重要性尚未在心理声学上得到证实。为了确定这些属性在声音质量感知中的作用，听众被要求调整语音合成器中抖动、闪烁和噪信比的水平，以便合成的声音与自然产生的标记相匹配。结果显示，尽管听众对噪声与信号比的判断很一致，但他们对抖动和闪烁的选择设置却不一致。听者在检测抖动和闪烁量变化的能力上的噪声依赖差异暗示了听者的不敏感和无法将抖动和闪烁作为声音非周期性整体模式中的单独维度，这是导致这种不一致的原因。这些结果表明，抖动和闪烁除了对声音频谱形状噪声的整体模式有声学贡献外，作为感知声音质量的独立指标并不有用。(c) 2005年美国声学学会。
Although jitter, shimmer, and noise acoustically characterize all voice signals, their perceptual importance in naturally produced pathological voices has not been established psychoacoustically. To determine the role of these attributes in the perception of vocal quality, listeners were asked to adjust levels of jitter, shimmer, and the noise-to-signal ratio in a speech synthesizer, so that synthetic voices matched naturally produced tokens. Results showed that, although listeners agreed well in their judgments of the noise-to-signal ratio, they did not agree with one another in their chosen settings for jitter and shimmer. Noise-dependent differences in listeners' ability to detect changes in amounts of jitter and shimmer implicate both listener insensitivity and inability to isolate jitter and shimmer as separate dimensions in the overall pattern of aperiodicity in a voice as causes of this poor agreement. These results suggest that jitter and shimmer are not useful as independent indices of perceived vocal quality, apart from their acoustic contributions to the overall pattern of spectrally shaped noise in a voice. (c) 2005 Acoustical Society of America.