Wiley T L, Block M G
J Speech Hear Res. 1979 Dec;22(4):677-96. doi: 10.1044/jshr.2204.677.
The basic principles of deriving static acoustic-immittance measurements in human ears are presented. Problems caused by differences in instrumentation, computations, and measurement technique are discussed in terms of the utility and comparisons of static acoustic-immittance measurements. Data are provided regarding the short- and long-term variabilities inherent to static measurements. Although our subject pool was relatively small, certain patterns were apparent in the short- and long-term variability inherent to static acoustic-impedance measurements. The intra-event variability about the mean static acoustic impedance was small and varied inversely with probe-tone frequency. Standard deviations were less than 50 acoustic ohms for a 220-Hz probe tone and less than 25 acoustic ohms for a 660-Hz probe tone. Session-to-session variability in static measurements varied little within subjects but varied greatly across subjects. There was little correlation between the mean and standard deviation for within-subject measurements. Standard deviations across subjects approximate a relatively constant proportion (30-40%) of the mean static value. The need for large population studies of static acoustic-immittance measurements is noted.
介绍了在人耳中获取静态声导抗测量值的基本原理。从静态声导抗测量值的实用性和比较方面，讨论了仪器、计算和测量技术差异所导致的问题。提供了有关静态测量中固有的短期和长期变异性的数据。尽管我们的受试者群体相对较小，但在静态声阻抗测量中固有的短期和长期变异性中，某些模式是明显的。关于平均静态声阻抗的事件内变异性较小，且与探测音频率成反比。对于220赫兹的探测音，标准偏差小于50声欧姆；对于660赫兹的探测音，标准偏差小于25声欧姆。静态测量中受试者之间的会话间变异性在受试者内变化很小，但在受试者之间变化很大。受试者内测量的平均值和标准偏差之间几乎没有相关性。受试者之间的标准偏差约占平均静态值的相对恒定比例（30 - 40%）。指出了对静态声导抗测量进行大规模人群研究的必要性。
