... It is shown that at the old-age (linear) stage the energy spectrum of the noise has an universal structure: it is proportional to the second power of the frequency at small frequencies and decreases exponentially at high frequencies. ...
... decrease the dynamic band of AO cell working as an acoustic signal spectrum analyzer ... method allows to increase the dynamic band of AO spectrum analyzer by 20 dB ... in a wide range and improve the characteristics of an AO spectrum analyzer ...
... which correspond to the various intervals of the energy spectrum, is described ... in time and their scale decreases for the motions with continuous energy spectrum ...
... Mech. 1997, v. 344, p. 339] that the asymptotic form of the spectrum is self-similar and depends only on two integral parameters of the initial spectrum: the variance of the velocity and its spatial scale. ...
... In this case, frequency spectrum of an output signal (light beam intensity) may essentially differ from a spectrum of a signal relevant to a .monochromatic. acoustic wave. ...
... It is based on measurement of Doppler frequency spectrum of the difference frequency acoustic wave scattered from the bubble stream and it comparison with the model spectrum. ...
... The analysis of acoustic pulses spectrum and typical appearance of the destruction areas shows the significant contribution of thermoacoustic effect and cavitation into the process of the tissue destruction. ...