Specification of the geometry of the human ear canal for the prediction of sound-pressure level distribution.
Specification of the geometry of the human ear canal for the prediction of sound-pressure level distribution.
复制标题
DOI：
10.1121/1.397744
复制
发表时间：
1989-06
期刊：
影响因子：
--
通讯作者：
M. R. Stinson;B. W. Lawton
中科院分区：
文献类型：
--
作者：
M. R. Stinson;B. W. Lawton
对15个人耳道的几何形状进行了研究。硅橡胶模具由人体身体的耳道制成，使用机械测头系统在每个模具的表面上获得大约1000个坐标点。数据点在三个空间方向上的精度都在0.03 mm左右，允许足够的表面细节分辨率。这些测量被总结为单个耳道面积功能，即在耳道弯曲后垂直于弯曲中轴的横切面面积。在学科间发现了很大的差异，但在区域功能上有几个明显的总体趋势。对耳道几何形状的准确规范使得对频率大于8 kHz的人耳道沿线声压分布的预测得到了改进。这些预测与高频测听方法、高保真助听器的发展有关，也与生理和心理声学实验的解释有关。
The geometry of 15 human ear canals has been studied. Silicone rubber molds were made of the ear canals of human cadavers, and a mechanical probe system was used to obtain approximately 1000 coordinate points over the surface of each mold. The data points were accurate to about 0.03 mm in each of the three space directions, allowing ample resolution of surface detail. The measurements have been summarized as individual ear canal area functions, the area of cross-sectional slices normal to a curved central axis following the bends of the canal. Large intersubject differences were found, but several overall trends were evident in the area functions. Accurate specification of the canal geometry has lead to improved predictions of the sound-pressure distribution along the human ear canal at frequencies greater than 8 kHz. Such predictions are relevant to the development of high-frequency audiometric methods, high-fidelity hearing aids, and to the interpretation of experiments in physiological and psychological acoustics.