Modelling Sound Absorbing Materials
Buch, Englisch, 376 Seiten, Format (B × H): 175 mm x 250 mm, Gewicht: 829 g
ISBN: 978-0-470-74661-5
Verlag: Wiley
"The first edition of this book is considered the bible of this topic. Suffice it to say that there is no other published treatise that approaches the depth of treatment offered by this book. The coverage is the state of the published art, while the added contents cover the new known developments in the field." Haisam Osman; Technology Development Manager, United Launch Alliance
This long-awaited second edition of a respected text from world leaders in the field of acoustic materials covers the state of the art with a depth of treatment unrivalled elsewhere. Allard and Atalla employ a logical and progressive approach that leads to a thorough understanding of porous material modelling.
The first edition of Propagation of Sound in Porous Media introduced the basic theory of acoustics and the related techniques. Research and development in sound absorption has however progressed significantly since the first edition, and the models and methods described, at the time highly technical and specialized, have since become main stream. In this second edition, several original topics have been revisited and practical prediction methods and industrial applications have been added that increase the breadth of its appeal to both academics and practising engineers.
New chapters have also been added on numerical modeling in both low (finite element) and high frequency (Transfer Matrix Method).
Collating ‘must-have’ information for engineers working in sound and vibration, Propagation of Sound in Porous Media, 2nd edition offers an indisputable reference to a diverse audience; including graduate students and academics in mechanical & civil engineering, acoustics and noise control, as well as practising mechanical, chemical and materials engineers in the automotive, rail, aerospace, building and civil industries.
Autoren/Hrsg.
Fachgebiete
Weitere Infos & Material
Preface to the second edition.
1 Plane waves in isotropic fluids and solids.
1.1 Introduction.
1.2 Notation – vector operators.
1.3 Strain in a deformable medium.
1.4 Stress in a deformable medium.
1.5 Stress–strain relations for an isotropic elastic medium.
1.6 Equations of motion.
1.7 Wave equation in a fluid.
1.8 Wave equations in an elastic solid.
References.
2 Acoustic impedance at normal incidence of fluids. Substitution of a fluid layer for a porous layer.
2.1 Introduction.
2.2 Plane waves in unbounded fluids.
2.3 Main properties of impedance at normal incidence.
2.4 Reflection coefficient and absorption coefficient at normal incidence.
2.5 Fluids equivalent to porous materials: the laws of Delany and Bazley.
2.6 Examples.
2.7 The complex exponential representation.
References.
3 Acoustic impedance at oblique incidence in fluids. Substitution of a fluid layer for a porous layer.
3.1 Introduction.
3.2 Inhomogeneous plane waves in isotropic fluids.
3.3 Reflection and refraction at oblique incidence.
3.4 Impedance at oblique incidence in isotropic fluids.
3.5 Reflection coefficient and absorption coefficient at oblique incidence.
3.6 Examples.
3.7 Plane waves in fluids equivalent to transversely isotropic porous media.
3.8 Impedance at oblique incidence at the surface of a fluid equivalent to an anisotropic porous material.
3.9 Example.
References.
4 Sound propagation in cylindrical tubes and porous materials having cylindrical pores.
4.1 Introduction.
4.2 Viscosity effects.
4.3 Thermal effects.
4.4 Effective density and bulk modulus for cylindrical tubes having triangular, rectangular and hexagonal cross-sections.
4.5 High- and low-frequency approximation.
4.6 Evaluation of the effective density and the bulk modulus of t
