Porter F L, Miller R H, Marshall R E
Child Dev. 1986 Jun;57(3):790-802.
The relation between neonatal cry features elicited by painful circumcision procedures and the perceived urgency of those cries was investigated. Vocalizations were recorded during circumcision of 30 normal newborn males, analyzed by spectrographic methods and validated with computer techniques. The most invasive procedures elicited significantly longer crying bouts; shorter quiet intervals; shorter, more frequent vocalizations; higher peak fundamental frequencies; fewer harmonics; and greater variability of the fundamental. Cries elicited by the most intrusive procedures were judged by adult listeners to be the most urgent, and cries from similarly invasive procedures were judged to be of the same degree of urgency. Cries appeared to be judged along 3 dimensions described by harmonic, temporal, and pitch characteristics. Subjective judgments and objective quantitative data converge to demonstrate that infants' cries are perceived as varying and, objectively, do systematically vary with respect to the intensity of painful stimuli.
研究了包皮环切术这种疼痛操作引发的新生儿哭声特征与这些哭声被感知的紧急程度之间的关系。在对30名正常男新生儿进行包皮环切术期间记录其发声，通过频谱分析方法进行分析，并采用计算机技术进行验证。侵入性最强的操作引发的哭闹时间明显更长；安静间隔更短；发声更短、更频繁；基频峰值更高；谐波更少；基频的变异性更大。成年听众判断，侵入性最强的操作引发的哭声最为紧急，类似侵入性操作引发的哭声被判断为紧急程度相同。哭声似乎是根据谐波、时间和音高特征所描述的三个维度来判断的。主观判断和客观定量数据趋于一致，表明婴儿的哭声被认为存在差异，并且客观上确实会随着疼痛刺激的强度而系统地变化。
