Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Computer Aided Modeling of Human Mastoid Cavity Biomechanics Using Finite Element Analysis | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 203037 9 pages doi 2010 203037 Research Article Computer Aided Modeling of Human Mastoid Cavity Biomechanics Using Finite Element Analysis Chia-Fone Lee 1 2 3 Peir-Rong Chen 2 3 Wen-Jeng Lee 4 Yuan-Fang Chou 5 Jyh-Horng Chen 1 6 and Tien-Chen Liu7 1 Institute of Biomedical Engineering National Taiwan University 790 Taipei Taiwan 2 Department of Otolaryngology Buddhist Tzu Chi General Hospital 790 Hualien Taiwan 3 Department of Medicine Tzu Chi University 790 Hualien Taiwan 4 Department of Medical Imaging National Taiwan University Hospital 100 Taipei Taiwan 5 Institute of Mechanical Engineering College of Mechanical Engineering National Taiwan University 106 Taipei Taiwan 6 Institute of Electrical Engineering College of Electrical Engineering and Computer Science National Taiwan University 106 Taipei Taiwan 7Department of Otolaryngology National Taiwan University Hospital 100 Taipei Taiwan Correspondence should be addressed to Tien-Chen Liu liuent@ Received 27 April 2009 Accepted 16 June 2009 Academic Editor Joao Manuel R. S. Tavares Copyright 2010 Chia-Fone Lee et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. The aim ofthepresent study was to analyze the human mastoid cavity on sound transmission using finite element method. Pressure distributions in the external ear canal and middle ear cavity at different frequencies were demonstrated. Our results showed that first blocking the aditus improves middle ear sound transmission in the 1500- to 2500-Hz range and decreases displacement in frequencies below 1000 Hz when compared with the normal ear. Second at frequencies lower than 1000 Hz the acoustic pressures were almost uniformly distributed in the external ear canal and middle ear
