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The book presents a broad-scope analysis of piezoelectric electromechanical transducers and the related aspects of practical transducer design for underwater applications. It uses an energy method for analyzing transducer problems that provides the physical insight important for the understanding of electromechanical devices. Application of the method is first illustrated with transducer examples that can be modeled as systems with a single degree of freedom, (such as spheres, short cylinders, bars and flexural disks and plates made of piezoelectric ceramics). Thereupon, transducers are modeled as devices with multiple degrees of freedom. In all these cases, results of modeling are presented in the form of equivalent electromechanical circuits convenient for the calculation of the transducers' operational characteristics. Special focus is made on the effects of coupled vibrations in mechanical systems on transducer performance. The book also provides extensive coverage of acoustic radiation including acoustic interaction between the transducers. The book is inherently multidisciplinary. It provides essential background regarding the vibration of elastic passive and piezoelectric bodies, piezoelectricity, acoustic radiation, and transducer characterization. Scientists and engineers working in the field of electroacoustics and those involved in education in the field will find this material useful not only for underwater acoustics, but also for electromechanics, energy conversion and medical ultrasonics. Part II contains general information on vibration of mechanical systems, electromechanical conversion in the deformed piezoceramic bodies, and acoustic radiation that can be used independently for treatment transducers of different type.

Technology --- electromechanical circuits --- piezoelectric transducers --- Acoustic Transduction --- underwater sound --- electroacoustics

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The data and rationale for translating head and torso simulator measurements from eardrum to other acoustic reference points such as free field and diffuse field are provided in this standard.

Electro-acoustics. --- Electroacoustics --- Acoustical engineering --- Electrical engineering --- Music --- Sound --- Acoustics and physics

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From a mathematical point of view, acoustics and electromagnetism exhibit similar phenomena and are tackled with the same kind of technique. Jones's exhaustive study is unique in providing a unified treatment of the two fields, bringing out their common and disparate features and showing how they cross-fertilize one another. The book is designed so that the reader with a familiarity with either Maxwell's Equations or the equation of sound waves in fluid dynamics can follow the developments in both fields without difficulty. This is a comprehensive treatment which will provide a needed reference for researchers in applied mathematics and mathematical physics but also caters to the student, who is taken up to the frontiers of research with the help of appropriate exercises. Engineers with any sort of mathematical competence, particularly electrical engineers and those concerned with communications technology, will need to have access to it.

Electromagnetic waves. --- Sound-waves. --- Ondes électromagnétiques --- Ondes sonores --- Electromagnetic waves --- Sound-waves --- 534.86 --- Vibration --- Waves --- Electromagnetic energy --- Electromagnetic radiation --- Electromagnetic theory --- Sound transmission (radio, television, film). Electroacoustics --- 534.86 Sound transmission (radio, television, film). Electroacoustics --- Ondes électromagnétiques

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621.395.6 --- 534.86 --- Telephone apparatus --- Sound transmission (radio, television, film). Electroacoustics --- Elektro-akoestiek --- Elektro-akoestiek. --- 534.86 Sound transmission (radio, television, film). Electroacoustics --- 621.395.6 Telephone apparatus --- Technologie --- Media --- Architectuur --- Fysica --- Akoestiek --- Elektroakoestiek --- 20e eeuw

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The data and rationale for translating head and torso simulator measurements from eardrum to other acoustic reference points such as free field and diffuse field are provided in this standard. Scope: This standard provides the data, techniques, and rationale for translating head and torso simulator measurements from the eardrum to other acoustic reference points, such as the free field and the diffuse field. It applies primarily to measurements of devices that contact the ear, such as headsets and handsets. It can also be used for devices that do not contact the ear, such as speakerphones and wearable devices. It is applicable to communication and multimedia audio devices over the frequency range of 20 Hz to 20 kHz Purpose: Common acoustic reference points are needed for comparing electroacoustic performance of handsets, headsets, speakerphones and other kinds of communication devices. It is also needed for comparing communication devices with other devices such as loudspeakers, multimedia terminals and consumer audio equipment. The free field and diffuse field are appropriate reference points because the results relate closely to what we hear. For measurements on communication devices, the free field or diffuse field are more widely applicable reference points than the legacy ear reference point (ERP).

Electro-acoustics. --- Electroacoustics --- Acoustical engineering --- Electrical engineering --- Music --- Sound --- Acoustics and physics --- Digital computer simulation --- Electronic data processing --- Standards.