The influence of noise on vowel and consonant cues
The influence of noise on vowel and consonant cues
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DOI：
10.1121/1.2118407
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发表时间：
2005-12-01
影响因子：
2.4
通讯作者：
Loizou, PC
中科院分区：
文献类型：
--
作者：
Parikh, G;Loizou, PC
本研究评估了噪声对元音和顿音频谱的声学和感知影响。在-5 ~ +10 dB S/N范围内，在元音和停止刺激中加入多说话人的牙牙学语和语音形噪声，并通过(a)噪声和清洁频谱在三个频段内的频谱包络差异，(b)噪声中是否存在可靠的F1和F2信息，以及(c)突发频率和斜率的变化来量化噪声的影响。声学分析表明，F1比F2更可靠，噪声和干净元音频谱之间的最大频谱包络差异出现在中频波段。这一发现表明，在极端嘈杂的条件下，听者必须依靠相对准确的F1频率信息和部分F2信息来识别元音。即使在-5分贝时，尽管附加噪声会干扰突发信号，但停止辅音的识别仍然很高，这表明听者必须依赖其他信号，可能是形成峰转换，来识别停止。(c) 2005年美国声学学会。
This study assessed the acoustic and perceptual effect of noise on vowel and stop-consonant spectra. Multi-talker babble and speech-shaped noise were added to vowel and stop stimuli at -5 to +10 dB S/N, and the effect of noise was quantified in terms of (a) spectral envelope differences between the noisy and clean spectra in three frequency bands, (b) presence of reliable F1 and F2 information in noise, and (c) changes in burst frequency and slope. Acoustic analysis indicated that F1 was detected more reliably than F2 and the largest spectral envelope differences between the noisy and clean vowel spectra occurred in the mid-frequency band. This finding suggests that in extremely noisy conditions listeners must be relying on relatively accurate F1 frequency information along with partial F2 information to identify vowels. Stop consonant recognition remained high even at -5 dB despite the disruption of burst cues due to additive noise, suggesting that listeners must be relying on other cues, perhaps formant transitions, to identify stops. (c) 2005 Acoustical Society of America.