摘要
目的:研究外耳道与中耳腔的存在对声音传导的影响。方法:通过微CT扫描和逆向成型技术建立中耳有限元模型,通过建立外耳道与中耳腔,计算外耳道与中耳腔对声音空气传导与骨传导的影响。结果:气传导中,外耳道提高了0.5～6kHz频率段的镫骨足板响应,在3kHz频率处出现峰值,高达11dB。中耳腔主要降低了镫骨足底板中低频段的响应,在低频段降低幅值较大,为2～4dB;骨传导中,外耳道略微降低了骨传导下镫骨足底板低频段的响应,但提高了中高频段镫骨足底板位移,在1.5kHz频率处出现峰值,增幅为1.9dB。中耳腔主要增大镫骨足板1.5kHz附近中频段响应,最大增幅为2.5dB。结论:气传导中,外耳道的存在大幅提高了其中频段响应,中耳腔的存在将降低其低中频段响应。而骨传导中,外耳道及中耳腔对骨传导影响较小。
Objective:To study the influence of the ear canal and middle ear cavity on air conduction and bone conduction.Method:A finite element model of the human middle ear was established.By establishing the external ear canal and the middle ear cavity,we evaluated the effects of the external canal and the middle ear cavity on air conduction and bone conduction.Result:In air conduction,the external canal improved the stapes response at the frequency range of 0.5 kHz to 6 kHz,and the maximum increase was 11 dB at 3 kHz.The middle ear cavity mainly reduced the response of stapes at mid-low frequency,with the drops of 2-4 dB under 2 kHz;in bone conduction,ear canal slightly reduced the low-frequency response,but increased the response of the stapes at the midhigh frequency,with a maximum increase of 1.9 dB at 1.5 kHz.The middle ear cavity mainly increased the stapes response at mid-frequency near 1.5 kHz,with a maximum increase of 2.5 dB.Conclusion:Our results show that,in air conduction,the ear canal significantly increases the middle-frequency response,while the middle ear cavity decreases the low-mid frequency response.Whereas,the ear canal and the middle ear cavity have slightly effect on bone conduction.
作者
赵禹
张怿翔
刘后广
王浩
潘啸
黄新生
ZHAO Yu;ZHANG Yixiang;LIU Houguang;WANG Hao;PAN Xiao;HUANG Xinsheng(School of Mechatronic Engineering,China University of Mining and Technology,Xuzhou,221116,China;Department of Otolaryngology,Shanghai Zhongshan Hospital Affiliated to Fudan University)
出处
《临床耳鼻咽喉头颈外科杂志》
CAS
北大核心
2019年第3期251-254,258,共5页
Journal of Clinical Otorhinolaryngology Head And Neck Surgery
基金
国家自然科学基金项目(No:51775547)
上海市科学与技术委员会基金项目(No:17411962200)
江苏高校品牌专业建设工程资助项目(No:PPZY2015B120)
关键词
气传导
骨传导
外耳道
中耳腔
有限元模型
air conduction
bone conduction
ear canal
middle ear cavity
finite element model
