LEADER 05375nam 2200661Ia 450 001 9910829859503321 005 20170809171600.0 010 $a1-282-34953-8 010 $a9786612349539 010 $a0-470-74733-1 010 $a0-470-74734-X 035 $a(CKB)1000000000822213 035 $a(EBL)470199 035 $a(OCoLC)502012620 035 $a(SSID)ssj0000307159 035 $a(PQKBManifestationID)11192743 035 $a(PQKBTitleCode)TC0000307159 035 $a(PQKBWorkID)10243793 035 $a(PQKB)11514361 035 $a(MiAaPQ)EBC470199 035 $a(PPN)244896216 035 $a(EXLCZ)991000000000822213 100 $a20090724d2009 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aPropagation of sound in porous media$b[electronic resource] $emodelling sound absorbing materials /$fJean F. Allard, Noureddine Atalla 205 $a2nd ed. 210 $aHoboken, NJ $cWiley$d2009 215 $a1 online resource (374 p.) 300 $aDescription based upon print version of record. 311 $a0-470-74661-0 320 $aIncludes bibliographical references and index. 327 $aPropagation of Sound in Porous Media; Contents; 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; 2.2.1 Travelling waves 327 $a2.2.2 Example2.2.3 Attenuation; 2.2.4 Superposition of two waves propagating in opposite directions; 2.3 Main properties of impedance at normal incidence; 2.3.1 Impedance variation along a direction of propagation; 2.3.2 Impedance at normal incidence of a layer of fluid backed by an impervious rigid wall; 2.3.3 Impedance at normal incidence of a multilayered fluid; 2.4 Reflection coefficient and absorption coefficient at normal incidence; 2.4.1 Reflection coefficient; 2.4.2 Absorption coefficient; 2.5 Fluids equivalent to porous materials: the laws of Delany and Bazley 327 $a2.5.1 Porosity and flow resistivity in porous materials2.5.2 Microscopic and macroscopic description of sound propagation in porous media; 2.5.3 The Laws of Delany and Bazley and flow resistivity; 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 327 $a3.4.1 Impedance variation along a direction perpendicular to an impedance plane3.4.2 Impedance at oblique incidence for a layer of finite thickness backed by an impervious rigid wall; 3.4.3 Impedance at oblique incidence in a multilayered fluid; 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 327 $a4 Sound propagation in cylindrical tubes and porous materials having cylindrical pores4.1 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 the air in layers of porous materials with identical pores perpendicular to the surface; 4.6.1 Effective density and bulk modulus in cylindrical pores having a circular cross-section 327 $a4.6.2 Effective density and bulk modulus in slits 330 $a""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 empl 606 $aPorous materials$xAcoustic properties$xMathematical models 606 $aAbsorption of sound 606 $aSound$xTransmission 615 0$aPorous materials$xAcoustic properties$xMathematical models. 615 0$aAbsorption of sound. 615 0$aSound$xTransmission. 676 $a620.11694015118 700 $aAllard$b J.-F$01603698 701 $aAtalla$b Noureddine$01593291 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910829859503321 996 $aPropagation of sound in porous media$93928180 997 $aUNINA