Titze Ingo R, Maxfield Lynn, Palaparthi Anil
National Center for Voice and Speech, The University of Utah, Salt Lake City, Utah; Department of Communication Sciences and Disorders, The University of Iowa, Iowa City, Iowa.
National Center for Voice and Speech, The University of Utah, Salt Lake City, Utah.
J Voice. 2016 Jul;30(4):398-406. doi: 10.1016/j.jvoice.2015.06.002. Epub 2015 Jul 9.
Voice production is an inefficient process in terms of energy expended versus acoustic energy produced. A traditional efficiency measure, glottal efficiency, relates acoustic power radiated from the mouth to aerodynamic power produced in the trachea. This efficiency ranges between 0.0001% and 1.0%. It involves lung pressure and hence would appear to be a useful effort measure for a given acoustic output. Difficulty in the combined measurement of lung pressure and tracheal airflow, however, has impeded clinical application of glottal efficiency. This article uses the large data base from Schutte (1980) and a few new measurements to validate a pressure conversion ratio (PCR) as a substitute for glottal efficiency. PCR has the potential for wide application because of low cost and ease of use in clinics and vocal studios.
就所消耗的能量与所产生的声能而言，发声是一个效率低下的过程。一种传统的效率衡量指标，即声门效率，将从口腔辐射出的声功率与气管中产生的空气动力功率联系起来。这种效率在0.0001%至1.0%之间。它涉及肺压力，因此对于给定的声学输出似乎是一种有用的用力程度衡量指标。然而，肺压力和气管气流联合测量的困难阻碍了声门效率的临床应用。本文利用舒特（1980年）的大型数据库以及一些新的测量结果来验证压力转换率（PCR）作为声门效率的替代指标。由于成本低且在诊所和声乐工作室易于使用，PCR具有广泛应用的潜力。
