Inverse solution of ear-canal area function from reflectance.
Inverse solution of ear-canal area function from reflectance.
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DOI：
10.1121/1.3654019
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发表时间：
2011-12
期刊：
影响因子：
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通讯作者：
D. M. Rasetshwane;S. Neely
中科院分区：
文献类型：
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作者：
D. M. Rasetshwane;S. Neely
许多声学应用需要将声学量（例如在耳道入口处测量的阻抗和压力）转换为鼓膜处的量。这种转变通常需要了解耳道的形状。以前测量耳道面积功能的尝试要么是侵入性的、不可再现的，要么只能测量耳道沿着的一个点的面积功能。本文介绍了一种通过测量耳道入口处的声阻抗来确定耳道面积函数的方法。该方法是基于一个解决方案的逆问题，其中测量阻抗被用来计算反射率，然后被用来确定运河的面积函数。使用这种方法确定的平均耳道面积函数与其他研究人员使用不同技术测量的平均耳道面积函数相似。该方法的优点是无创、快速、可重复性好.
A number of acoustical applications require the transformation of acoustical quantities, such as impedance and pressure that are measured at the entrance of the ear canal, to quantities at the eardrum. This transformation often requires knowledge of the shape of the ear canal. Previous attempts to measure ear-canal area functions were either invasive, non-reproducible, or could only measure the area function up to a point mid-way along the canal. A method to determine the area function of the ear canal from measurements of acoustic impedance at the entrance of the ear canal is described. The method is based on a solution to the inverse problem in which measurements of impedance are used to calculate reflectance, which is then used to determine the area function of the canal. The mean ear-canal area function determined using this method is similar to mean ear-canal area functions measured by other researchers using different techniques. The advantage of the proposed method over previous methods is that it is non- invasive, fast, and reproducible.