Ohde R N, Perry A H
Division of Hearing and Speech Sciences, Vanderbilt University School of Medicine, Nashville, Tennessee 37232.
J Acoust Soc Am. 1994 Sep;96(3):1303-13. doi: 10.1121/1.410278.
The processes involved in the perception of spectral change between the nasal murmur and the vocalic transition for speakers of different ages were assessed before and after disruption of the variation in spectra between these elements. Three children, aged 3, 5, and 7, and an adult female and male produced consonant-vowel (CV) syllables consisting of either [m] or [n] followed by [i] or [u]. In one condition (spectrally noncontiguous), the acoustic information surrounding the region of spectral change was digitally removed and in another condition (spectrally contiguous) this portion of the signal was retained. In both of these conditions, intervals of silence ranging from 0 to 2000 ms were inserted between 50-ms segments of murmur and vocalic transition. These gap duration conditions were then presented to adult listeners for the identification of the nasal. Across speakers, the results for the spectral contiguous condition support a primary mechanism in the perception of spectral relations that is mediated by processes within short-term auditory memory, but the results for the spectral noncontiguous condition revealed little consistent support for either short-term or long-term memory processes.
在破坏鼻腔杂音和元音过渡之间频谱变化之前和之后，对不同年龄的说话者感知这两者之间频谱变化所涉及的过程进行了评估。三名儿童，年龄分别为3岁、5岁和7岁，以及一名成年女性和一名成年男性发出了由[m]或[n]后跟[i]或[u]组成的辅音-元音（CV）音节。在一种条件下（频谱不连续），围绕频谱变化区域的声学信息被数字去除，而在另一种条件下（频谱连续），信号的这一部分被保留。在这两种条件下，在50毫秒的杂音段和元音过渡段之间插入了0到2000毫秒不等的静音间隔。然后将这些间隙持续时间条件呈现给成年听众以识别鼻音。在所有说话者中，频谱连续条件下的结果支持了一种由短期听觉记忆中的过程介导的频谱关系感知的主要机制，但频谱不连续条件下的结果几乎没有为短期或长期记忆过程提供一致的支持。
