Written in English
Thesis (Ph.D.) - Loughborough University, 1997.
|Statement||by Robin Alcock.|
Acoustics: Sound Fields and Transducers is a thoroughly updated version of Leo Beranek's classic book that retains and expands on the original's detailed acoustical fundamentals while adding practical formulas and simulation methods. Serving both as a text for students in engineering departments and as a reference for practicing engineers, this book focuses on 5/5(2). This thesis is concerned with the design and development of measuring devices for the characterisation of acoustic transients with high temporal and spatial resolution. Three new techniques are demonstrated characterising acoustic transients generated by Nd-YAG laser (nm, 30ns, 55mJ) assisted breakdown of water and : Robin D. Alcock. The transient wave forms permit direct measurement of many quantities difficult to obtain by sine‐wave measurements. Thickness mode piezoelectric transducers are used to generate these short‐duration acoustic : E. G. Cook. In this paper, we report a study of thin cylindrical transducers widely used in petroleum acoustic-logging tools. By adopting the method describing a thin spherical-shell transducer's transient.
The acoustic elements—acoustic mass, acoustic compliance, acoustic resistance—are treated in detail. -acoustical circuit for them. The response in different frequency regions is detailed along with power output. The measurement of Thiele–Small parameters is explained. Acoustics: Sound Fields, Transducers and Vibration, Second. re #ector, and measuring the echo amplitude as a function of frequency. The unit of measure is dB relative to 1 Volt per micropascal. Figure of Merit. This graph is a summation of TVR and RVR and provides a measure of two-way performance. A transducer whose!gure of merit response has a wide. Ultrasonic transducers are key components in sensors for distance, flow and level measurement as well as in power, biomedical and other applications of ultrasound. Ultrasonic transducers reviews recent research in the design and application of this important technology. Part one provides an overview of materials and design of ultrasonic. Acoustics: Sound Fields and Transducers is a thoroughly updated version of Leo Beranek's classic book that retains and expands on the original's detailed acoustical fundamentals while adding practical formulas and simulation methods.. Serving both as a text for students in engineering departments and as a reference for practicing engineers, this book focuses on electroacoustics, analyzing.
Ultrasonic Transducers Technical Notes Transducer Waveform and Spectrum b. Acoustic Impedance, Reflectivity and Attenuation c. Sound Field d. Other Parameters of a Sound Beam sizing flaws or measuring the attenuation of a material. The relative change in signal amplitude is commonly measured in decibels. Decibel values. About this book This second edition provides comprehensive information on electromagnetic acoustic transducers (EMATs), from the theory and physical principles of EMATs to the construction of systems and their applications to scientific and industrial ultrasonic measurements on materials. Transducers fabricated from sol-gel composites are used in high-temperature non-destructive evaluation because of their suitable frequency range, high-temperature stability, thermal-cycle durability, high signal-to-noise ratio, broadband frequency characteristics, good acoustic bonding and curved-surface conformability. The sound pressure level (SPL) of an acoustic transient can be quantified in several ways. The SPL value obtained is dependent on measurement procedure, in addition to signal and transducer characteristics. The acoustic spectrum of a signal shows sound pressure as a function of frequency.