Few acoustic studies have attempted to examine anticipatory effects in the earliest part of the release of stop consonants. We investigated the ability of spectral coefficients to reveal anticipatory coarticulation in the burst and early aspiration of stops in monosyllables. Twenty American English speakers produced stop (/k,t,p/) – vowel (/æ,i,o/) – stop (/k,t,p/) sequences in two phrase positions. The first four spectral coefficients (mean, standard deviation, skewness, kurtosis) were calculated for one window centered on the burst of the onset consonant and two subsequent, non-overlapping windows. All coefficients showed an influence of vowel-to-consonant anticipatory coarticulation. Which onset consonant showed the strongest vowel effect depended on the specific coefficient under consideration. A context-dependent consonant-to-consonant anticipatory effect was observed for onset /p/. Findings demonstrate that spectral coefficients can reveal subtle anticipatory adjustments as early as the burst of stop consonants. Different results for the four coefficients suggest that comprehensive spectral analyses offer advantages over other approaches. Studies using these techniques may expose previously unobserved articulatory adjustments among phonetic contexts or speaker populations.

很少有声学研究试图检查停辅音释放最早部分的预期效果。我们研究了频谱系数揭示单音节中停顿的爆发和早期吸入中的预期协同发音的能力。二十个美国英语使用者在两个短语位置产生停止 (/k,t,p/) – 元音 (/æ,i,o/) – 停止 (/k,t,p/) 序列。前四个频谱系数（平均值、标准偏差、偏度、峰度）是针对以起始辅音爆发为中心的一个窗口和两个随后的非重叠窗口计算的。所有系数都显示了元音到辅音预发音的影响。哪个起始辅音表现出最强的元音效果取决于所考虑的特定系数。对于开始 /p/ 观察到上下文相关的辅音到辅音的预期效应。研究结果表明，频谱系数早在停辅音爆发时就可以揭示微妙的预期调整。四个系数的不同结果表明，综合频谱分析提供了优于其他方法的优势。使用这些技术的研究可能会揭示以前未观察到的语音上下文或说话者群体之间的发音调整。