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| 編輯推薦： |
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本书主要介绍了利用普通商业扬声器获取180dB及以上大振幅纯净驻波场，为非线性驻波场理论的最终建立和利用变截面驻波管获取大振幅非线性纯净驻波场的方法奠定坚实的理论和实验基础。
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| 內容簡介： |
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本书用传递矩阵法分析了截面突变的分节驻波管和截面渐变的驻波管的失谐性质。同时，将传递矩阵法推广用于分析截面逐渐变化的分节驻波管的失谐性质。在此基础上，利用由大口径高功率扬声器和锥形口组成声源，通过实验研究了如何在均匀截面、突变截面和锥形截面驻波管中获取大幅纯驻波场的方法及所获得的大振幅驻波场的非线性特性。此外，对这些驻波管中得到的大振幅纯驻波场的非线性特性进行了比较实验研究。研究结果为非线性驻波场理论的最终建立和非线性驻波场的实际应用提供了可靠的实验依据。
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| 關於作者： |
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闵琦，1972年12月生。物理学教授，理学博士。2010年从中国科学院声学研究所马大猷先生创立的九室博士毕业，获理学博士学位，方向为物理声学。现担任物理学教学专业指导委员会西南地区委员、大学物理教学专业指导委员会西南地区委员、红河学院学术委员会专业委员会委员、红河学院工学院学术委员会委员，同时担任红河学院物理学科学术领衔人以及红河学院物理系教学团队带头人。近年来，主持国家自然科学基金项目2项，参与国家自然科学基金项目3项以及中科院三期知识创新工程重要方向资助项目1项，以学术领衔人和专业带头人主持红河学院学科建设、红河学院教学团队建设等校级项目多项。近年来，在国内外物理学、声学知名学术期刊如《Journal of the Acoustical Society of America》、《Physics Letters A》、《Applied Acoustics》、《Acoustical Physics》、《声学学报》、《物理学报》等同时以第一作者和通讯作者发表SCI、EI学术论文近20篇，并担任国内外声学顶级期刊《Applied Acoustics》和《声学学报》审稿人。由科学出版社出版专著1部，机械工业出版社出版教材2部和中国科技大学出版社出版教材1部。
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| 目錄：
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Chapter 1Stepped Acoustic Resonator with an Abrupt Cross Section
1.1Introduction
1.2Transfer Matrix Method
1.3Experimental Setup
1.4Results
1.4.1Onestep Acoustic Resonator
1.4.2Twostep Acoustic Resonator
1.4.3Multistep Acoustic Resonator
1.5Conclusions
References
Chapter 2Acoustic Resonator with a Gradually Varying Cross Section
2.1Introduction
2.2Gradually Varying Shape and Sound Field
2.2.1Gradually Varying Geometric Shape
2.2.2Sound Field
2.3Transfer Matrix and Resonant Condition
2.3.1Transfer Matrix
2.3.2Resonant Condition
2.4Transfer Function and Phase
2.5Impedance
2.6Conclusions
References
Chapter 3Stepped Acoustic Resonator with a Smooth Transitional Section
3.1Introduction
3.2The Transfer Matrices of the Stepped Acoustic Resonator
with a Gradually Varying Crosssectional Area
3.3Transfer Function and Phase
3.4Impedance
3.5Conclusions
References
Chapter 4Largeamplitude Standingwave Fields in the Standingwave
Tube with a Uniform Cross Section
4.1Introduction
4.2Experimental Setup
4.3Results and Discussions
4.3.1Transfer Matrix and Resonance Frequencies
4.3.2Largeamplitude Standingwave Field Excited at Peak
Resonant Frequencies
4.3.3Largeamplitude Standingwave Field Excited at Valley
Resonant Frequencies
4.3.4Variation of the SPL of a Largeamplitude Standingwave
Field with the Driving Voltage
4.4Conclusions
References
Chapter 5Largeamplitude Standingwave Fields in the Stepped Standingwave
Tube with an Abrupt Cross Section
5.1Introduction
5.2The Stepped Standingwave Tube with Abrupt Cross Section
5.3Results and Discussions
5.3.1Transfer Function and Resonance Frequency
5.3.2Largeamplitude Sandingwave Fields Excited at Peak
Resonance Frequencies
5.3.3Largeamplitude Standingwave Fields Excited at Trough
Resonance Frequencies
5.3.4Fundamental Wave SPL of the Largeamplitude Standing
wave Field Excited at Resonance Frequencies
5.3.5Particle Velocity Peak of the Largeamplitude Standing
wave Field Excited at Resonance Frequencies
5.3.6Wave Distortion of the Largeamplitude Standingwave
Field Excited at Resonance Frequencies
5.4Conclusions
References
Chapter 6Largeamplitude Standingwave Fields in the Stepped
Standingwave Tube with a Tapered Cross Section
6.1Introduction
6.2The Stepped Standingwave Tube with a Tapered Cross Section
6.3Results and Discussions
6.3.1Transfer Function and Resonance Frequency
6.3.2Largeamplitude Sandingwave Fields Excited at Peak
Resonance Frequencies
6.3.3Largeamplitude Standingwave Fields Excited at Trough
Resonance Frequencies
6.3.4Fundamental Wave SPL of the Largeamplitude Standingwave
Field Excited at Resonance Frequencies
6.3.5Particle Velocity Peak of the Largeamplitude Standingwave
Field Excited at Resonance Frequencies
6.3.6Wave Distortion of the Largeamplitude Standingwave
Field Excited at Resonance Frequencies
6.4Conclusions
References
Chapter 7Comparison of the Generation of Extremely Nonlinear Pure
Standingwave Fields in a Standingwave Tube
7.1Introduction
7.2The Standingwave Tube
7.3Sound Pressure Transfer Function
7.4Extremely Nonlinear Standingwave Fields at the First
Resonance Frequency
7.4.1Waveform of the Extremely Nonlinear Standingwave Field
7.4.2Development of the Extremely Nonlinear
Standingwave Field
7.4.3Increase of the SPL with Driving Voltage
7.5Conclusions
References
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| 內容試閱：
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The research on the generation and the extremely nonlinear properties of largeamplitude pure standingwave fields are of great significance to the final establishment and the practical application of nonlinear standingwave field theory. A standingwave tube with nonuniform section has acoustic dissonant properties， and largeamplitude pure standingwave fields can be generated in such a tube.
In this book， a transfer matrix methods used to analyze the acoustic dissonant properties of the stepped acoustic resonators with abrupt crosssectional area in Chapter 1 and the acoustic resonators with gradually varying crosssectional area in Chapter 2. As a continuation of the two chapters， the transfer matrix method is extended to analyze the acoustic dissonant properties of stepped acoustic resonators with gradually varying crosssectional area in Chapter 3.
A sound source is composed of a bigcaliber highpower loudspeaker and a conical mouth can converge the energy output of the loudspeaker efficiently. With the improved sound source， the methods to obtain the largeamplitude pure standingwave fields and their extremely nonlinear properties in standingwave tube with uniform cross section are investigated experimentally in Chapter 4. Furthermore， with the same improved sound source and the acoustic dissonant properties of stepped acoustic resonator， the methods to obtain the largeamplitude pure standingwave fields in standingwave tube with abrupt and tapered cross sections are investigated experimentally in Chapters 56，respectively. Meanwhile， the extremely nonlinear properties of obtained largeamplitude pure standingwave fields are also investigated experimentally.
In Chapter 7， the acoustic properties of the standingwave tubes with uniform，abrupt and tapered cross sections are investigated experimentally for comparison. Moreover， comparative experimental studies on the extremely nonlinear properties of obtained largeamplitude pure standingwave fields in these standingwave tubes are carried out. The results provide a reliable experimental basis for the final establishment of the theory and practical application of the nonlinear standingwave field.
Min Qi
Department of Physics， Honghe University， 2022
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