Sound waves : propagation, frequencies and effects / Vitale Abagnali and Giampaolo Fabbri, editors.

Format:

Book

Contributor:

Abagnali, Vitale.

Fabbri, Giampaolo.

Series:

Acoustics Research and Technology

Acoustics research and technology

Language:

English

Subjects (All):

Sound-waves.

Physical Description:

1 online resource (251 p.)

Edition:

1st ed.

Place of Publication:

Hauppauge, N.Y. : Nova Science Publishers, c2012.

Language Note:

English

Summary:

In this book, the authors present current research in the study of the propagation, frequency and effects of sound waves. Topics discussed include time resolved visualization and analysis on a single short acoustic wave generation; elastic vibrations of an isotropic plate with laser-induced atomic defects; sound velocity into turbulent medium; infrasound generation by turbulent convection; neutrons diffraction in a crystal under the influence of a sound wave and the transformation of sound waves in non-stationary media.

Contents:

Intro

SOUND WAVES PROPAGATION, FREQUENCIES AND EFFECTS

CONTENTS

PREFACE

TIME RESOLVED VISUALIZATION AND ANALYSIS ON A SINGLE SHORT ACOUSTIC WAVE GENERATION, PROPAGATION AND INTERACTION

Abstract

1. INTRODUCTION

2. EXPERIMENT AND NUMERICAL SIMULATIONS

A. Time Resolved Acoustic Wave Imaging: Laser flash Schlieren photography

B. Numerical simulations

3. RESULTS AND DISCUSSIONS

3.1. Laser Induced Thermoelastic Acoustic Wave Generation in Water

3.2. Laser Induced Acoustic Waves in Various External Channels

A. Single Block

B. Double Block (A Channel)

D. 33º Tilted Single Block

E. Concave Cylindrical Lens (Acoustic Wave Focusing)

F. Viscosity Effect (Propagation Velocity and Attenuation)

3.3. Laser Induced Acoustic waves in Various Internal Channels

A. Sudden Expansion and Contraction Channels

B. Bifurcating Channels: T Branched and Y Branched Channels

C. Gradual Contraction Wall Channels: Linear Contraction and Parabolic Contraction Wall Channel

D. Trapped Acoustic Wave in a Cylinder

CONCLUSION

ACKNOWLEDGMENT

REFERENCES

ELASTIC VIBRATIONS OF AN ISOTROPIC PLATE WITH LASER-INDUCED ATOMIC DEFECTS

2. BASIC EQUATIONS

3. FORMULATION OF THE PROBLEM

4. BASIC SOLUTIONS

5. DISPERSION EQUATIONS IF THE WAVE IN AN INFINITIVE MEDIUM

6. DISPERSION EQUATION OF THE PLANE WAVE IN PLATES

7. LIMITING FORMS OF THE FREQUENCY EQUATIONS

ELECTROACOUSTIC MONITORING OF COLLOIDAL STATE CHANGES IN SODIUM CASEINATE STABILIZED OIL IN WATER EMULSIONS

1.1. Fundamentals of electroacoustics

1.2. Sodium Caseinate Stabilized Emulsions and Challenges in Formulation

2. MATERIALS AND METHODS

2.1. Emulsion Preparation.

2.2. Determination of Size Distribution Using Light Scattering

2.3. Acoustic and Electroacoustic Spectrometer

3. RESULTS AND DISCUSSION

3.1. Electroacoustic Properties of Sodium Caseinate Emulsions as a Function of Concentration

3.2. Destabilization of emulsion droplets: acidification

3.3. Interactions between the Oil Droplets and a Charged Polymer: High Methoxyl Pectin (HMP)

3.4. Destabilization of the oil droplets due to depletion flocculation

NUMERICAL ASSESSMENT OF MULTI-CHAMBER MUFFLERS HYBRIDIZED WITH MULTIPLE PERFORATED INTRUDING TUBES USING GA METHOD

1. NOMENCLATURE

2. INTRODUCTION

3. THEORETICAL BACKGROUND

3.1. Four-pole Transfer Matrices

3.2. Overall Sound Power Level

3.3. Objective Function

(A) STL maximization for a tone (f) noise

(B) SWL minimization for a broadband noise

4. MODEL CHECK

5. CASE STUDIES

6. GENETIC ALGORITHM

7. RESULTS AND DISCUSSION

7.1. Results

7.1.1. Pure Tone Noise Optimization

7.1.2. Broadband Noise Optimization

7.2. Discussion

ACKNOWLEDGMENTS

APPENDIX A

Transfer Matrix of an Expanded Perforated Intruding Tube

APPENDIX B

Transfer Matrix of a Contracted Perforated Intruding Tube

REFERENCE

THE SOUND VELOCITY INTO TURBULENT FLOW

INTRODUCTION

CONSERVATION EQUATIONS FOR TURBULENT FLOW

INFRASOUND GENERATION BY TURBULENT CONVECTION

1.Introduction

2.GeneralCharacteristicsofAtmosphericInfrasound

3.HistoryofInfrasoundStudies

4.InstrumentationandProcessingTechniques

5.InfrasoundfromStrongConvectiveStorms

6.Lighthill'sAcousticAnalogy

6.1.MathematicalFormulation

6.2.Lighthill'sQuadrupoleSource

7.InfrasoundGenerationbyTornadicStorms

7.1.Generalformalism.

7.2.AnalysisofDifferentSources

7.3.Applicationtoinfrasoundgenerationbytornadicconvectivestorms

7.4.Spectrumofinfrasound

7.5.Infrasoundcorrelationwithtornadoes

8.Conclusion

References

ON THE NEUTRONS DIFFRACTION IN A CRYSTAL UNDER THE INFLUENCE OF A SOUND WAVE

2.Neutron-CrystalInteractionPotentialUndertheInfluenceofaSoundWave

3.S-MatrixTheory

4.DiffractionProbability

5.AnalysisoftheResults:DiffractionConditionandtheDebye-WallerFactor

5.1.Diffractioncondition

5.1.1.Influenceofatravelingsoundwave

5.1.2.Influenceofastandingsoundwave

5.2.TheDebye-Wallerfactor

Acknowledgments

ON THE TRANSFORMATION OF SOUND WAVES IN NON-STATIONARY MEDIA

2.BasicEquations

2.1.Basicequationsoffluiddynamics

2.2.Soundwaves

3.TransformationofSoundWavesinNon-StationaryMediawithAbruptlyChangingParameters

4.TransformationofSoundWavesinNon-StationaryMediawithSmoothlyChangingParameters

5.Conclusion

TOMOGRAPHY TECHNIQUE TO SYNOPTIC MAPPING OF OCEAN MESO-SCALE FIELD

ABSTRACT

1. MATHEMATICAL FORMULATION AND MODELING

1.1. Ocean Model

Oceanic Variability and its Effect on Acoustics

1.1a. Synoptic (Meso-Scale) Eddies

1.1b. Large Scale Currents and Frontal Zones

1.2a. Internal Waves

1.2b. Vertical Fine Structure

1.2c. Small Scale Turbulence

1.3. Forward Problem

1.4. Stochastic Inverse

2. DATA AND SIMULATION

3.1. Sound Velocity Field

3.2. EOF Modes

3.3. Data Resolution Matrix )(TppUU

3.4. Model Resolution Matrix )(TppVV

3.5. Eigen Rays

3.6. Ray Arrival Pattern

3.7. Acoustic Intensity

3.8. Inversion

Building the Estimates.

4. OBJECTIVE MAPPING OF TEMPERATURE FIELD BY STOCHASTIC INVERSE METHOD USING ACOUSTIC TOMOGRAPHY EXPERIMENTAL DATA OF EASTERN ARABIAN SEA

A1. Elements of Ocean Acoustics

A1.1. Wave Equation

A1.2. Ray Theory

APPENDIX-B

B1. Computational Procedures:

B2. Closeness Ratio

INDEX.

Notes:

Description based upon print version of record.

Includes bibliographical references and index.

Description based on print version record.

ISBN:

1-61470-169-5

OCLC:

830627704