Chapter 1 Properties and Testing Methods of Sound Absorption Materials 1
1.1 Properties of Porous Absorptive Materials 1
1.1.1 Thick Porous Absorptive Materials 1
1.1.2 Curtains and Fabrics 10
1.2 Measurement of Sound Absorption Materials 12
1.3 Measurement Method and Apparatus of Air Permeability and Yield Strength of Fiber Layer 20
1.3.1 Air Permeability 20
1.3.2 Yield Strength 22
Chapter 2 Introduction of Conventional Sound Absorption Theories 24
2.1 Sound Transmission of Porous Materials 24
2.1.1 Sound Transmission in the Round Pipe and Narrow Slit 24
2.1.2 Porous Sound Absorption Materials 31
2.2 Porous Sound Absorption Materials in Several Specific Cases 35
2.2.1 Sound Propagation in Porous Media 35
2.2.2 Sound Reduction due to Propagation through a Porous Material 37
2.2.3 Porous Sound Absorption Materials in Impedance Tube 38
2.2.4 Porous Materials with a Backing Cavity 43
2.2.5 Porous Liner Covered with a Limp Impervious Layer 44
2.2.6 Porous Liner Covered with a Perforated Sheet 45
2.2.7 Porous Liner Covered with a Limp Impervious Layer and a Perforated Sheet 46
Chapter 3 Sound Absorption Principle of Fibrous Materials 48
3.1 Introduction 48
3.2 Porous Material Sound Absorption Model 49
3.3 The Sound Energy Transmission Equation and Sound Absorption Spectrum Formula of Porous Material 56
3.4 The Air Permeability and Peak Sound Absorption Coefficient Formula of Porous Material 58
3.5 Sound Absorption Coefficient Formula of Porous Materials 67
3.6 Explanation of the Experimental Laws Quoted by the Literature about Sound Absorption of Porous Materials 75
3.7 Conclusions 80
Chapter 4 The Quantum Phenomenon of Fabrics' Vapor Permeability and Further Discussion about the Sound Absorption Principle of Porous Material 80
4.1 The Quantum Change Rule of Fabrics' Vapor Permeability 83
4.1.1 Test Methods and Environment 83
4.1.2 Characteristics of Water Vapor Permeability of Fabrics with Different Air Permeability and Similar Thickness 84
4.1.3 Characteristics of Water Vapor Permeability of the Fabrics with Similar Air Permeability and Different Thickness 85
4.1.4 Changes of the Water Vapor Permeability of the Fabrics with the Lapse of Time 86
4.1.5 Sum Up 88
4.2 Analyzing of the Sound Absorption Character of Porous Material with Vapor Content 89
4.2.1 Resonance Sound Absorption Model of Densely Porous Material 90
4.2.2 Analyzing of the Sound Absorption Character of Porous Material with Vapor Content 98
4.3 Conclusions 100
Chapter 5 Dark Energy of Sound Wave and Universe 104
5.1 Introduction 104
5.2 The Negative and Quantum Energy of Sound Wave 108
5.2.1 The Interaction Principle of Sound Wave and Flexible Materials 108
5.2.2 The Negative Energy of Sound Wave 110
5.3 Analysis of Acoustic Waves and Cosmic Dark Energy 112
5.4 Conclusions 114
Chapter 6 The Wave Essence of Photon 117
6.1 Introduction 117
6.2 The Wave Theory of Photon's Essence 119
6.2.1 Deriving of the Photon Energy Equation with Classical Wave Theory 119
6.2.2 Interpreting of the Compton Effect and Photoelectric Effect By Classical Wave-Vibration Theory 121
6.2.3 Energy Transmission Equation of Light Wave to Electron 126
6.2.4 Phase Shift between Light Wave and Vibrator 128
6.2.5 Discussions 133
6.3 Conclusions 144
Chapter 7 Electromagnetic Wave Absorption Model of Atmosphere and Atmospheric Window Formula 146
7.1 Introduction 146
7.2 The Research Situation of Transmitting and Decay of Infrared in the Atmosphere 149
7.2.1 The Empirical Study in the First Half of the 20th Century 149
7.2.2 The Theoretical Research in the Latter Half of 20th Century 151
7.3 The Atmosphere Absorption Principle of Electromagnetic Wave 158
7.4 Atmospheric Window Formula 166
7.5 Discussion 170
7.5.1 The Lateral Amplitude of Electromagnetic Wave 170
7.5.2 The Atmospheric Halo over the City 173
7.5.3 The Effect of Frequency and Vapour Content to the Transmittance of Electromagnetic Wave 174
7.5.4 Rotation Absorption and Emission of Molecules 175
7.6 Conclusions 178
Appendix A Oscillation and Sound Wave 182
A.1 Oscillation 182
A.1.1 Description of Simple Harmonic Motion 182
A.1.2 Energy in Simple Harmonic Motion 185
A.1.3 Damped Oscillations 187
A.1.4 Driven Oscillations and Resonance 188
A.2 Sound Wave 189
A.2.1 Plane Waves 189
A.2.2 Harmonic(Sinusoidal)Waves 191
Appendix B Introduction of Quantum Theory 194
B.1 Blackbody Radiation and Planck's Quantum Hypothesis 194
B.2 The Hypothesis of Light Quanta and the Photoelectric Effect 197
B.3 The Compton Effect by the Hypothesis of Light Quanta 202
B.4 Bohr Atom,Electron Wave 206
B.5 Wave Function 215
B.6 Quantum Particle in a Box 217
Appendix C 中文论文 224
Appendix D Fundamental Constants 290