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Duct acoustics : fundamentals and applications to mufflers and silencers / Erkan Dokumaci, Dokuz Eylül University.

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"Using a hands-on approach, this self-contained toolkit covers topics ranging from the foundations of duct acoustics to the acoustic design of these devices, through practical modelling, optimization and measurement techniques. Discover in-depth analyses of one- and three-dimensional models of...

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Bibliographic Details
Online Access: Full Text (via Cambridge)
Main Author: Dokumaci, Erkan, 1942- (Author)
Format: Electronic eBook
Language:English
Published: Cambridge, United Kingdom ; New York, NY : Cambridge University Press, 2021.
Subjects:
Gas tubing > Soundproofing.
Air ducts > Acoustic properties > Mathematical models.
Fluids > Acoustic properties > Mathematical models.
Hydraulic machinery > Noise.
Gas-machines > Noise.
Acoustical engineering.
Table of Contents:
  • Cover
  • Half-title
  • Title page
  • Copyright information
  • Dedication
  • Contents
  • Preface
  • 1 Some Preliminaries
  • 1.1 Introduction to the Linear Theory of Sound Wave Motion
  • 1.1.1 Linearization Hypothesis
  • 1.1.2 Partitioning Turbulent Fluctuations
  • 1.1.3 Linearization of Inviscid Fluid Flow
  • 1.1.4 Evolution of Non-Linear Waves
  • 1.2 Representation of Acoustic Waves in the Frequency Domain
  • 1.2.1 Fourier Transform
  • 1.2.2 Periodic Functions
  • 1.2.3 Impulse Sampling
  • 1.2.4 Power Spectral Density
  • 1.3 Representation of Waves in the Wavenumber Domain
  • 1.3.1 Spatial Fourier Transform
  • 1.3.2 Briggs' Criterion
  • 1.4 Intensity and Power of Sound Waves
  • 1.5 Introduction to the Linear System View of Duct Acoustics
  • References
  • 2 Introduction to Acoustic Block Diagrams
  • 2.1 Introduction
  • 2.2 Classification of Acoustic Models of Ducts
  • 2.2.1 Classification by Number of Ports
  • 2.2.2 Classification by Type of Port
  • 2.2.2.1 One-Dimensional Elements
  • 2.2.2.2 Modal Elements
  • 2.3 Mathematical Models of Acoustic Elements
  • 2.3.1 One-Port Elements
  • 2.3.2 Two-Port Elements
  • 2.3.3 Multi-Port Elements
  • 2.4 Assembly of Blocks
  • 2.4.1 Assembly of Two-Ports
  • 2.4.2 Assembly of Multi-Ports
  • 2.4.3 Optimization of Global Matrix Size
  • 2.4.4 Contraction of Assembled Modal Two-Ports
  • 2.5 Acoustic Elements Based on Numerical Methods
  • 2.5.1 The Finite Element Method
  • 2.5.2 The Boundary Element Method
  • 2.6 Programming Considerations
  • References
  • 3 Transmission of Low-Frequency Sound Waves in Ducts
  • 3.1 Introduction
  • 3.2 One-Dimensional Theory of Sound Propagation in Ducts
  • 3.2.1 Unsteady Flow Equations
  • 3.2.2 Equations Governing Acoustic Wave Motion
  • 3.3 Solution of Linearized Acoustic Equations
  • 3.8 Acoustic Boundary Conditions on Duct Walls
  • 3.8.1 Impermeable Walls
  • 3.8.1.1 No-Slip Model
  • 3.8.1.2 Full-Slip Model
  • 3.8.1.3 Partial-Slip Model
  • 3.8.1.4 Rough-Wall Model
  • 3.8.1.5 Unified Boundary Condition
  • 3.8.2 Permeable Walls
  • 3.9 Homogeneous Ducts with Impermeable Finite Impedance Walls
  • 3.9.1 Non-Uniform Duct
  • 3.9.2 Uniform Duct
  • 3.9.2.1 Direction of Propagation
  • 3.9.2.2 Wave Equation
  • 3.9.2.3 Impedance Eduction Formula
  • 3.9.2.4 Peripherally Non-Uniform Wall Impedance
  • 3.9.3 Finite Wall Impedance Models
  • 3.9.3.1 Lined Impermeable Walls

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