發(fā)布時(shí)間：2018-03-11 20:00

  本文選題：聲帶　切入點(diǎn)：聲帶模型　出處：《陜西師范大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：計(jì)算機(jī)、數(shù)字處理技術(shù)的發(fā)展和嗓音醫(yī)學(xué)研究的進(jìn)步,使醫(yī)生準(zhǔn)確、客觀、迅速的對嗓音進(jìn)行檢測成為可能。嗓音質(zhì)量的定量評估有助于判斷嗓音障礙的程度,嗓音醫(yī)學(xué)的發(fā)展需要對嗓音質(zhì)量進(jìn)行定量評估,過去憑借主觀聽覺印象判斷嗓音障礙程度的方法已經(jīng)遠(yuǎn)遠(yuǎn)不能適應(yīng)現(xiàn)代嗓音醫(yī)學(xué)的發(fā)展要求。但目前在臨床應(yīng)用較少,其主要原因是部分聲學(xué)參數(shù)的測量結(jié)果不能對嗓音相關(guān)病變做出診斷或鑒別診斷：療效觀察缺乏聲學(xué)參數(shù)對照標(biāo)準(zhǔn)�，F(xiàn)在尚沒有對聲帶相關(guān)病變診斷模型的研究,亦沒有明確的療效觀察對照標(biāo)準(zhǔn)。 在語音器官中,聲帶是最容易受損傷和發(fā)生病變的關(guān)鍵部位。多種因素形成的聲帶振動特性在很大程度上決定了嗓音音源的特性。各種發(fā)聲方式、不同喉病變和病變程度都表現(xiàn)為不同的聲帶振動模式。聲帶振動是決定音質(zhì)的關(guān)鍵因素,因而對聲帶振動進(jìn)行客觀評價(jià)和定量分析是一項(xiàng)十分重要的工作。 而以往的研究中,并沒有考慮到聲帶的分層結(jié)構(gòu)以及病理性聲帶的振動特性。本文針對聲帶的生理結(jié)構(gòu)、發(fā)聲機(jī)理展開研究,將聲學(xué)中的換能器陣列振動理論引入到聲帶振動的研究中,運(yùn)用換能器矩陣列振動來模擬聲帶的發(fā)聲,主要作了以下幾個(gè)方面的工作： 1、對聲帶的生理結(jié)構(gòu)、聲帶各個(gè)組成部分的功能、聲帶的發(fā)生機(jī)理以及病理性聲帶的特點(diǎn)作了詳細(xì)的闡述。 2、根據(jù)聲帶的振動特性、聲帶的解剖結(jié)構(gòu)提出一種聲帶振動的模型,該模型可以實(shí)現(xiàn)對成年健康人的與病理性的聲帶振動特性的研究。 3、運(yùn)用聲學(xué)換能器矩陣列理論與數(shù)學(xué)中的微元化思想對聲帶振動所產(chǎn)生的聲場進(jìn)行理論分析,通過matlab模擬了聲帶振動模型產(chǎn)生的聲場。得到 1)聲帶振動模型中近聲場的對角線上的聲壓變化規(guī)律； 2)聲帶振動模型中遠(yuǎn)聲場的聲壓變化規(guī)律,針對距離聲帶模型中心為R(R聲帶模型對角線長)的球面上的聲壓的變化,提出適應(yīng)于研究聲壓變化的橢球模型。在橢球模型中,通過橢球上某一點(diǎn)到球心距離反應(yīng)聲帶振動模型中該點(diǎn)的聲壓的大小。進(jìn)而實(shí)現(xiàn)對病理性聲帶振動模型、不同的張開角度下的聲帶振動模型產(chǎn)生的遠(yuǎn)聲場的分析。
[Abstract]:The development of computer, voice and medical research of digital processing technology progress, make the doctor accurate, objective, rapid detection of possible voice. Help to determine the degree of voice disorders quantitative evaluation of the voice quality, the development of voice medicine need to voice quality in the past with quantitative evaluation, subjective auditory impression judging method of voice the obstacle degree has not adapt to the development of modern medical research of voice requirements. But the clinical application is less, the main reason is that the measurement results of acoustic parameters of voice part can not do a related pathological diagnosis or differential diagnosis: Observation of the effect of the lack of criteria of acoustic parameters. Now there is no study on vocal related disease diagnosis model, also no clear clinical observation.
In the speech organs, the vocal cords are the most susceptible to injury and pathological changes of key parts. Vocal vibration characteristics to a great extent to multi factors determine the characteristics of voice audio source. All kinds of voice, different laryngeal lesions and lesions showed different patterns. The vibration of the vocal cords of vocal fold vibration is a key factor to determine the quality of the therefore, to analyze the vibration of the vocal cords and the quantitative evaluation is a very important work.
But in the previous study, does not take into account the hierarchical structure of the vocal cords and vibration characteristics of pathological vocal cords. According to the physiological structure of the vocal cords, the sounding mechanism of the vibration theory of acoustic transducer array is introduced to study the vibration of the vocal cords in the use of energy transfer sounder matrix to simulate the vibration of the vocal cords, mainly the following work has been done:
1, the physiological structure of the vocal cord, the function of the various components of the vocal cord, the mechanism of the vocal cord and the characteristics of the pathological vocal cord are described in detail.
2, according to the vibration characteristics of vocal cords and the anatomical structure of vocal cords, a vocal cord vibration model is proposed, which can achieve the study of the vocal cord vibration characteristics of adult healthy people.
3, the acoustic field generated by the vocal cord vibration is theoretically analyzed by using the theory of acoustic transducer matrix column and the idea of Infinitesimal in mathematics, and the sound field generated by the vocal cord vibration model is simulated by MATLAB.
1) the change law of sound pressure on the diagonal of the near sound field in the sound band vibration model.
2)澹板甫鎸姩妯″瀷涓繙澹板満鐨勫０鍘嬪彉鍖栬寰，

本文編號：1599672