Sound pressure distribution within natural and artificial human ear canals: forward stimulation.
Sound pressure distribution within natural and artificial human ear canals: forward stimulation.
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DOI：
10.1121/1.4898420
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发表时间：
2014-12
期刊：
影响因子：
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通讯作者：
M. Ravicz;Jeffrey Tao Cheng;J. Rosowski
中科院分区：
文献类型：
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作者：
M. Ravicz;Jeffrey Tao Cheng;J. Rosowski
这项工作的一部分，在耳道（EC）与鼓膜（TM）表面位移的声压的相互作用的研究。在人颞骨中缩短的天然EC或人工EC内的三个位置处以0.5-2 mm的间距测量声压：TM表面附近、鼓室环平面内和横切EC长轴的平面内。声压也被测量，在2毫米的间隔沿着长EC轴。通过平面声压梯度的大小和方向、驻波节线的位置和方向以及纵向驻波沿着EC轴的位置来很好地描述声场。垂直于EC长轴的驻波节线存在于TM表面上>11-16 kHz的天然或人工EC中。在鼓膜环平面的声压范围大于在TM表面或在横向EC平面。纵向驻波图案被拉伸。鼓膜环声场是TM声场的有用近似，并且人工EC近似于自然EC。
This work is part of a study of the interaction of sound pressure in the ear canal (EC) with tympanic membrane (TM) surface displacement. Sound pressures were measured with 0.5-2 mm spacing at three locations within the shortened natural EC or an artificial EC in human temporal bones: near the TM surface, within the tympanic ring plane, and in a plane transverse to the long axis of the EC. Sound pressure was also measured at 2-mm intervals along the long EC axis. The sound field is described well by the size and direction of planar sound pressure gradients, the location and orientation of standing-wave nodal lines, and the location of longitudinal standing waves along the EC axis. Standing-wave nodal lines perpendicular to the long EC axis are present on the TM surface >11-16 kHz in the natural or artificial EC. The range of sound pressures was larger in the tympanic ring plane than at the TM surface or in the transverse EC plane. Longitudinal standing-wave patterns were stretched. The tympanic-ring sound field is a useful approximation of the TM sound field, and the artificial EC approximates the natural EC.