Department of Communication Disorders, Auburn University, Auburn, Alabama 36849, USA.
J Voice. 2012 Jan;26(1):18-23. doi: 10.1016/j.jvoice.2010.10.021. Epub 2011 Apr 7.
The purpose of this study was to determine whether the number of syllables collected and performance end effects had a significant effect on phonation threshold pressure (PTP) estimates.
Ten adult females with normal voices produced five- and seven-syllable trains of /pi/ at low, modal, and high pitches. The results were analyzed using repeated-measures analysis of variance to determine whether a difference existed in PTP when a five-syllable train was collected versus when a seven-syllable train was collected and whether the typically discarded first and last syllables within a train differed from the middle syllables.
The results indicated that there was no significant difference in estimated PTP values when calculated from a five-syllable versus a seven-syllable train or between the first, middle, and last syllables within a train.
Based on these findings, it appears that a five-syllable train provides adequate information from which to estimate PTP values. Furthermore, these findings also suggest that within the five-syllable train, any three adjacent syllables could be used to estimate PTP. These findings are significant in developing a clinically standardized, effective, and efficient method for collecting PTP.
本研究旨在确定采集的音节数和发音效果末端是否对声门闭合压（PTP）估计值有显著影响。
10 名女性正常嗓音者在低、中、高声区分别发 5 个和 7 个音节的 /pi/音列。采用重复测量方差分析来分析结果，以确定采集 5 个音节音列与采集 7 个音节音列时 PTP 估计值是否存在差异，以及音列中通常丢弃的首末音节与中间音节是否存在差异。
结果表明，从 5 个音节音列和 7 个音节音列计算得出的 PTP 值估计值之间没有显著差异，音列中的首、中、尾音节之间也没有显著差异。
基于这些发现，似乎 5 个音节的音列就能提供足够的信息来估计 PTP 值。此外，这些发现还表明，在 5 个音节的音列中，可以使用任意三个相邻的音节来估计 PTP。这些发现对于开发临床标准化、有效和高效的 PTP 采集方法具有重要意义。
