摘要
依据人工中耳的机械模型[6],抽象出六条假设,并由此建立人工中耳力学模型。由变分原理及贝赛尔函数推导出人工鼓膜位移与声压的关系,得到鼓膜位移的解析解,并由此得到听骨位移。经与试验测得位移相对比,证明该方程的正确性。依据方程可以避免环境和测试人员技术水平的干扰,能够更客观地评价人工听骨的传声性能。而且该方法简单易行,同时它还可以优化听骨的材料和形状。
Six hypotheses were drawn based on a machine model of middle ear,and its mechanical model was constructed.The functional relationship between displacement and sound pressure was deduced by using variational principle and Bessel function.Then the analytic solution of the eardrum displacement was obtained,and moreover the ear ossicle displacement was obtained.Comparing the results with those of tests,the correctness of the derived equation was shown.The equation could be applied for estimating the acoustic characteristics of the artificial ossicle and avoiding disturbance of environment and technical level of personnel.Furthermore,the proposed method was easy to use and could be used to optimize material and shape of an ossicle.
出处
《振动与冲击》
EI
CSCD
北大核心
2009年第3期55-58,共4页
Journal of Vibration and Shock
基金
上海大学博士点基金
博士创新基金资助(A.15-0118-07-002)
关键词
人工听骨
中耳结构
欧拉方程
变分原理
贝赛尔函数
artificial ossicle
middle ear structure
Euler equation
variational principle
bessel function
