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- W1499647470 abstract "Quasi-continuous acoustic wave packets are used forinvestigations of real objects due to determination of their material parameterssuch as, for example, propagation velocity of an acoustic wave, or localisationof their inner structures. Application of low sampling frequencies (500kHz) incomparison with the strict harmonic probing signals [ampersand]sim;1.5MHz offers verypromising measuring possibilities (detection of the transit time changes ofacoustic signal [ampersand]asymp;5ns). This paper shows the test measurement results for aglass vessel (300mm probing path in distilled water) and patients withpathological changes (ischemia and internal haemorrhage in the brain tissue)using the phase and time methods. High sensitivity of measurements ensuresdetection of differences in density of the order of [ampersand]sim;3[ampersand]middot;10-3kg/m3,propagation velocity of acoustic wave [ampersand]sim;4[ampersand]middot;10-2m/s, temperature[ampersand]sim;1.5[ampersand]middot;10-2K and change of the acoustic path [ampersand]sim;4[ampersand]mu;µm. Sensibilityand simplicity of the measuring system makes the proposed solution a veryattractive tool for investigations. It can be applied for measurement ofdifferent changes of the material properties in the automatic systems andmedicine." @default.
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- W1499647470 date "2001-01-01" @default.
- W1499647470 modified "2023-09-24" @default.
- W1499647470 title "Verification of measurement possibilities of quasi-continuous acoustic wavepackets for technical and medical applications" @default.
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