Weismer G, Fennell A M
J Acoust Soc Am. 1985 Jul;78(1 Pt 1):49-57. doi: 10.1121/1.392453.
The hypothesis that acoustic measures of relative speech timing remain constant across large changes in speaking rate was tested for fluent utterances produced by normal and neurogenically disordered speakers. For all speakers, relative timing tended to be statistically invariable across conversational and fast speaking rates. This finding was considered especially interesting in the case of speakers with dysarthria and apraxia of speech, because absolute measures of speech timing associated with these disorders are typically aberrant. A post hoc analysis of relative variability across speakers showed the ratio measures to be consistently less variable than measures of absolute interval duration. The greater similarity across speakers of ratio measures, as compared to interval measures, was taken to mean that characterizing the temporal structure of articulatory sequences in terms of relative timing is an appropriate way to capture an important aspect of the biological constraints associated with speech production.
针对正常和神经源性言语障碍患者流畅说出的话语，对语速大幅变化时相对言语时长的声学测量保持不变这一假设进行了测试。对于所有说话者而言，在对话语速和快速语速下，相对时长在统计学上往往是不变的。这一发现对于患有构音障碍和言语失用症的说话者来说尤为有趣，因为与这些障碍相关的言语时长绝对测量通常是异常的。对不同说话者相对变异性的事后分析表明，比率测量始终比绝对间隔时长测量的变异性小。与间隔测量相比，不同说话者的比率测量具有更大的相似性，这意味着用相对时长来描述发音序列的时间结构是捕捉与言语产生相关的生物限制一个重要方面的合适方法。
