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Malcolm J. Crocker
Engineering Acoustics
Читать книгу Engineering Acoustics - Malcolm J. Crocker - Страница 1
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Страница 1
Table of Contents
List of Tables
List of Illustrations
Guide
Pages
Страница 7
Страница 8
Страница 9
Страница 10
Страница 11
Страница 12
Acknowledgements
1 Introduction 1.1 Introduction
1.2 Types of Noise and Vibration Signals
1.2.1 Stationary Signals
1.2.2 Nonstationary Signals
1.3 Frequency Analysis
1.3.1 Fourier Series
Example 1.1
Solution
1.3.2 Nonperiodic Functions and the Fourier Spectrum
1.3.3 Random Noise
Example 1.2
Solution
Example 1.3
Solution
1.3.4 Mean Square Values
Example 1.4
Solution
1.3.5 Energy and Power Spectral Densities
1.4 Frequency Analysis Using Filters
Example 1.5
Solution
1.5 Fast Fourier Transform Analysis
References
2 Vibration of Simple and Continuous Systems 2.1 Introduction
2.2 Simple Harmonic Motion
2.2.1 Period, Frequency, and Phase
2.2.2 Velocity and Acceleration
Example 2.1
Solution
2.3 Vibrating Systems 2.3.1 Mass–Spring System
Example 2.2
Solution
Example 2.3
Solution
Example 2.4
Solution
2.4 Multi‐Degree of Freedom Systems
2.4.1 Free Vibration – Undamped
Example 2.5
Solution
2.4.2 Forced Vibration – Undamped
Example 2.6
Solution
Example
Solution
2.4.3 Effect of Damping
Example
Example 2.9
Solution
2.5 Continuous Systems
2.5.1 Vibration of Beams
Example 2.10
Solution
Example 2.11
Solution
2.5.2 Vibration of Thin Plates
Example 2.12
Solution
Example 2.13
References
3 Sound Generation and Propagation 3.1 Introduction
3.2 Wave Motion
3.3 Plane Sound Waves
Example 3.1
Solution
3.3.1 Sound Pressure
3.3.2 Particle Velocity
3.3.3 Impedance and Sound Intensity
3.3.4 Energy Density
3.3.5 Sound Power
3.4 Decibels and Levels
3.4.1 Sound Pressure Level
3.4.2 Sound Power Level
3.4.3 Sound Intensity Level
3.4.4 Combination of Decibels
Example 3.2
Solution
Example 3.3
Solution
Example 3.4
Example 3.5
Example 3.6
Solution
3.5 Three‐dimensional Wave Equation
3.6 Sources of Sound
3.6.1 Sound Intensity
3.7 Sound Power of Sources 3.7.1 Sound Power of Idealized Sound Sources
Example 3.7
Solution
Example 3.8
Solution
Example 3.9
Solution
3.8 Sound Sources Above a Rigid Hard Surface
Example 3.10
Solution
3.9 Directivity
3.9.1 Directivity Factor (
Q
(
θ
,
ϕ
))
3.9.2 Directivity Index
Example 3.11
Solution
3.10 Line Sources
3.11 Reflection, Refraction, Scattering, and Diffraction
Example 3.12
Solution
3.12 Ray Acoustics
3.13 Energy Acoustics
3.14 Near Field, Far Field, Direct Field, and Reverberant Field
3.14.1 Reverberation
3.14.2 Sound Absorption
3.14.3 Reverberation Time
Example 3.13
Solution
Example 3.14
Solution
3.15 Room Equation
3.15.1 Critical Distance
3.15.2 Noise Reduction
3.16 Sound Radiation From Idealized Structures
Example 3.15
Solution
3.17 Standing Waves
Example 3.16
Solution
3.18 Waveguides
3.19 Other Approaches 3.19.1 Acoustical Lumped Elements
3.19.2 Numerical Approaches: Finite Elements and Boundary Elements
3.19.3 Acoustic Modeling Using Equivalent Circuits
References
4 Human Hearing, Speech and Psychoacoustics 4.1 Introduction
4.2 Construction of Ear and Its Working
4.2.1 Construction of the Ear
4.2.2 Working of the Ear Mechanism
4.2.3 Theories of Hearing
4.3 Subjective Response
4.3.1 Hearing Envelope
4.3.2 Loudness Measurement
Example 4.1
Example 4.2
Solution
Example 4.3
Solution
4.3.3 Masking
4.3.4 Pitch
Example 4.4
Solution
4.3.5 Weighted Sound Pressure Levels
Example 4.5
Solution
4.3.6 Critical Bands
4.3.7 Frequency (Bark)
Example 4.6
Solution
4.3.8 Zwicker Loudness
4.3.9 Loudness Adaptation
4.3.10 Empirical Loudness Meter
4.4 Hearing Loss and Diseases (Disorders)
4.4.1 Conduction Hearing Loss
4.4.2 Sensory‐Neural Hearing Loss
4.4.3 Presbycusis
4.5 Speech Production
References
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