05515nam 2200661 450 991013911820332120230707220105.01-118-64933-81-118-64934-6(CKB)2550000001277689(EBL)1676651(SSID)ssj0001217382(PQKBManifestationID)11714656(PQKBTitleCode)TC0001217382(PQKBWorkID)11202025(PQKB)11033023(MiAaPQ)EBC1676651(Au-PeEL)EBL1676651(CaPaEBR)ebr10862703(CaONFJC)MIL599753(OCoLC)878552766(EXLCZ)99255000000127768920140501h20142014 uy 0engurcnu||||||||txtccrAcoustic particle velocity measurements using laser principles, signal processing and applications /Jean-Christophe ValièreLondon, England ;Hoboken, New Jersey :ISTE Ltd :John Wiley & Sons,2014.©20141 online resource (157 p.)Focus Series,2051-249XDescription based upon print version of record.1-84821-562-2 1-306-68502-8 Includes bibliographical references and index.Cover; Title Page; Contents; Preface; Chapter 1. Summary Of Acoustic Equations; 1.1. Basic equations; 1.1.1. Fluid- and thermodynamics; 1.1.2. Hypothesis of linear acoustics without losses; 1.2. Acoustic equations; 1.2.1. Linear acoustic equations with sources; 1.2.2. Some remarks on acoustic sources; 1.2.3. Without sources; 1.2.4. Acoustic intensity and source power; 1.2.5. Acoustic impedance and border conditions; 1.3. Constants, units and magnitude orders of linear acoustics; 1.4. Acoustic velocity measurement and applications; 1.4.1. Velocity estimation from pressure gradient1.4.2. Intensity estimation 1.4.3. Application to impedance estimation; 1.5. Beyond linear equations; 1.5.1. Acoustic equations with mean flow; 1.5.2. High acoustic displacement; 1.5.3. Acoustic streaming; 1.6. Bibliography; Chapter 2. Some Topics On Signal Processing; 2.1. Measurement signal; 2.1.1. Random signals; 2.1.2. Statistical averages; 2.1.3. Time averages; 2.1.4. Acoustic signal model; 2.2. Reminder of Fourier analysis tools; 2.2.1. Fourier transform; 2.2.2. Uniform sampling and recovery of signals; 2.2.3. Fourier transform of discrete signals; 2.2.4. Discrete Fourier transform2.3. Correlations and spectra 2.3.1. Definitions; 2.3.2. Stationary and ergodic process; 2.3.3. Properties of correlation functions and examples; 2.3.4. PSD and cross-spectral density properties; 2.4. Basis of estimation theory; 2.4.1. Definition and properties of an estimation method; 2.4.2. Mean estimator; 2.4.3. Correlation estimators; 2.4.4. Spectrum estimators; 2.4.5. Spectrum estimator by synchronous detection approach; 2.5. Non-uniform sampling; 2.5.1. Poisson processes; 2.5.2. Empirical estimators; 2.5.3. Comparison of spectrum estimation of random sampling sequences; 2.6. Bibliography2.7. Appendix 2.7.1. Properties of the Fourier transform; 2.7.2. Fourier transforms of typical functions; 2.7.3. Properties of the discrete Fourier transform (DFT); Chapter 3. Ldv For Acoustics; 3.1. Bases of LDV; 3.1.1. Optical principles; 3.1.2. Signal processing of burst analyses in the context of fluid mechanics; 3.2. Models for acoustics; 3.2.1. Model of the Doppler signal; 3.2.2. Model of the sampling in the context of acoustics; 3.2.3. Case of low acoustic displacement with few mean flows; 3.2.4. Case of high acoustic displacement with few mean flows; 3.2.5. Other cases3.3. Estimation method for low acoustic displacement 3.3.1. Theoretical limitations; 3.3.2. Estimation methods based on IF detection; 3.3.3. Estimation based on parametrical models; 3.3.4. Simultaneous detection of flow velocity and small acoustic velocity; 3.3.5. Comparison between methods for low-level acoustics; 3.4. Estimation method for high displacement; 3.4.1. Experimental condition; 3.4.2. Theoretical limitations; 3.4.3. Estimation for SPP; 3.4.4. Estimation for highly NSPP; 3.5. Bibliography; Chapter 4. Piv For Acoustics; 4.1. Principle of PIV; 4.1.1. Setting up4.1.2. Model of the 2D signal and image processingThis book concerns the presentation of particle velocity measurement for acoustics using lasers, including Laser Doppler Velocimetry (LDV or Anemometry (LDA)) and Particle Imagery Velocimetry (PIV).The objective is first to present the importance of measuring the acoustic velocity, especially when the acoustic equations are nonlinear as well as characterizing the near fields. However, these applications need to use non-invasive sensors. Some optical techniques, initially developed for fluid mechanics, have been adapted to the field of acoustics in recent years. This book summarizes 15Focus series (London, England)SoundMeasurementElectro-acousticsCongressesSoundMeasurement.Electro-acoustics534.42Valière Jean-Christophe892947MiAaPQMiAaPQMiAaPQBOOK9910139118203321Acoustic particle velocity measurements using laser1994543UNINA