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A new method to measure sound velocity and distance in homogeneous media simultaneously had been developed. It works with only one transducer and needs no additional reflectors at known positions. Instead the echoes of moving scattering particles are analyzed to determine the focus position as a second piece of information. An annular array allows to move the focus along the acoustic axis of the transducer...
Determining of size and shape of refectors with ultrasound imaging is subjected to several limitations. Beside the wavelength, the sound beam width is a second known constraint. However, the resolution can also be restricted by the analysed refector itself by its shape, alignment, surface roughness and material. Furthermore, different reflectors can be displayed identically with a simple c-scan, so...
A locally resolved monitoring of temperature distribution allows to investigate and optimize many industrial processes, like mixing or chemical reactions, as well as medical therapy, like hyperthermia for cancer therapy. In this paper a new measurement technique is applied, which allows to measure sound velocity and distance simultaneously without any reflector at a known position. Instead, the echoes...
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