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計算機輔助設(shè)計和有限元分析法在耳模聲學(xué)特性研究中的應(yīng)用 Application of computer aid design and finite elementmethod on the acoustic characteristics in earmold |
| 作者： 穆晨 吳濤 錢秀清 |
| 單位：中國聾兒康復(fù)研究中心(北京100029) |
| 關(guān)鍵詞： 耳模；導(dǎo)聲管；聲學(xué)特性；傳聲結(jié)構(gòu)；有限元分析方法; 聲固耦合 |
| 分類號：R318.04 |
| 出版年·卷·期（頁碼）：2017·36·1（45-49） |
| 摘要： |
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目的 探討采用計算機輔助設(shè)計和有限元聲固耦合計算方法分析耳模中導(dǎo)聲管聲學(xué)特性的可能性。方法 通過螺旋斷層數(shù)字掃描儀(computed tomography，CT)掃描并獲取志愿者耳部數(shù)據(jù)，建立外耳模型，再布爾計算出耳模及導(dǎo)聲管模型。應(yīng)用Ansys軟件和Aurical真耳分析儀分別計算和實測，輸入90dB聲壓，記錄頻率500～8000Hz耳模導(dǎo)聲管出口處壓力值。結(jié)果 有限元計算與實際測試耳模聲學(xué)特性結(jié)果趨勢相同；在導(dǎo)聲管影響下耳模的共振頻率在4000Hz左右，最大增益約為24dB，模擬計算結(jié)果較實際測試結(jié)果高6.8dB。結(jié)論 有限元分析方法可有效應(yīng)用于耳模聲學(xué)特性的研究。 |
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Objective The possibility of using the computer aid design and the finite element method of acoustic-structural coupled to analyze transaudient of the acoustic tube in earmold is discussed. Methods First，we collect the whole ear data of a volunteer by computed tomography (CT) and build the 3D outer ear model. Second we obtain the earmold and the acoustic tube by Boolean operation. Third，we calculate and measure the transaudient characteristic of the acoustic tube at the range from 500Hz to 8000Hz under 90dB SPL pressure by Ansys software and Aurical real-ear test equipment separately，and then we record the sound pressure at the outlet of acoustic tube. Results The trend of the results from the finite element analysis and the real-ear test are similar. The maximum gain of sound pressure level of finite element analysis is approximately 24dB in 4000Hz，which is 6.8dB higher than that of the real-ear test. Conclusions Finite element method is effective to analyze transaudient of the acoustic tube in earmold. |
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地址：北京安定門外安貞醫(yī)院內(nèi)北京生物醫(yī)學(xué)工程編輯部 電話：010-64456508 傳真：010-64456661 電子郵箱：[email protected] |