Applied Acoustics Fundamentals - Real Axis Integration Method and 2D Spectrum Technology

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Features: This book introduces the sound waves and sound waveguides excited by line sources on horizontal, circular liquid-solid interfaces and point sources on cylindrical liquid-solid interfaces. It provides computational and experimental results of the spatial distribution of the sound field at different moments during the propagation of sound waves in liquids and solids. The array reception waveforms and their two-dimensional spectra are also presented. To meet the needs of practical applications, the book analyzes the influence of the transducer bandwidth on the reception waveforms and their two-dimensional spectra. Using a large number of numerical computation results, it intuitively demonstrates the effect of the size of the transmitting transducer on the array reception waveforms and their two-dimensional spectra. The book introduces the measurement methods for the admittance and spectrum of acoustic wave transducers and provides actual measurement results. In the field of sound field computation, the real-axis integration method has been widely used, and the two-dimensional spectra originate from the intermediate results of the real-axis integration method, serving as an effective tool to connect theoretical calculations, acoustic wave waveform processing, and practical applications.
This book first establishes the physical image of sound wave propagation. Based on this, it discusses the acoustic wave waveforms and their two-dimensional spectra corresponding to these physical images. It then combines practical applications to explore specific measurement techniques and waveform processing methods. Finally, it discusses some specific two-dimensional spectrum processing methods based on engineering exploration and acoustic logging practices. This book serves as a graduate-level textbook and can also be referenced by senior undergraduate students and technical personnel engaged in engineering exploration and non-destructive testing in fields such as petroleum, water conservancy, power, transportation, and construction.