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Calibration of Ultrasonic Standard Probe Transducers

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A two-transducer method is described for calibrating standard probe transducers at megahertz frequencies. First, the transmitting current response of a relatively large auxiliary transducer is obtained using a self-reciprocity technique; then the probe transducer is calibrated in the known sound field of the auxiliary transducer. In order to achieve a sufficiently high measuring accuracy, the effects of different diameters of the transducers, the sound diffraction and attenuation losses and the disturbances of the sound field due to the reflections at the transducer, must be considered at megahertz frequencies. With the discussed corrections, the uncertainty of the measured results is estimated to be smaller than ± 1 dB.
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Document Type: Research Article

Publication date: November 1, 1976

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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