Wideband absorbance tympanometry using pressure sweeps: System development and results on adults with normal hearing
Wideband absorbance tympanometry using pressure sweeps: System development and results on adults with normal hearing
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DOI：
10.1121/1.3001712
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发表时间：
2008-12-01
影响因子：
2.4
通讯作者：
Keefe, Douglas H.
中科院分区：
文献类型：
--
作者：
Liu, Yi-Wen;Sanford, Chris A.;Keefe, Douglas H.
开发了一种具有中耳筛查和诊断测试潜力的系统，用于测量耳道中作为气压函数的宽带能量吸收（EA），并对听力正常的成年人进行了测试。使用点击刺激，在0.226和8 kHz之间的60个频率下测量EA。环境压力的结果与过去的研究相似。为了进行鼓室测压，使用大约75、100、200和400 daPa/s的扫描速度自动控制耳道中的气压以在-300至200 daPa之间扫描（上升/下降方向）。因此，宽带鼓室导抗测试的测量时间范围为1.5至7秒，适合于临床应用。一个带通鼓室图，计算每只耳朵的频率平均EA从0.38到2 kHz，有一个单峰的形状，但是，其鼓室峰值压力（TPP）的扫描速度和方向的函数移动。在TPP处估计的EA在不同的扫描速度下是相似的，但是在低于2kHz时高于在环境压力下测量的EA。未来的研究EA对正常耳的不同年龄组或受损的耳朵可能会比较成人正常基线在这项研究中获得。(C)2008年，美国声学学会。[DOI：10.1121/1.3001712]
A system with potential for middle-ear screening and diagnostic testing was developed for the measurement of wideband energy absorbance (EA) in the ear canal as a function of air pressure, and tested on adults with normal hearing. Using a click stimulus, the EA was measured at 60 frequencies between 0.226 and 8 kHz. Ambient-pressure results were similar to past studies. To perform tympanometry, air pressure in the ear canal was controlled automatically to sweep between -300 and 200 daPa (ascending/descending directions) using sweep speeds of approximately 75, 100, 200, and 400 daPa/s. Thus, the measurement time for wideband tympanometry ranged from 1.5 to 7 s and was suitable for clinical applications. A bandpass tympanogram, calculated for each ear by frequency averaging EA from 0.38 to 2 kHz, had a single-peak shape; however, its tympanometric peak pressure (TPP) shifted as a function of sweep speed and direction. EA estimated at the TPP was similar across different sweep speeds, but was higher below 2 kHz than EA measured at ambient pressure. Future studies of EA on normal ears of a different age group or on impaired ears may be compared with the adult normal baseline obtained in this study. (C) 2008 Acoustical Society of America. [DOI: 10.1121/1.3001712]