1 - 10 of 21 articles
Abstract To study the mechanisms that govern the coding of temporal features of complex sound signals, responses of single neurons located in the dorsal nucleus of the medulla oblongata (the cochlear nucleus) of a curarized grass frog (Rana temporaria) to pure tone bursts and amplitude modulated...
Abstract The effect of a pulse jam on the audibility of pure tones in the bottlenose dolphin (Tursiops truncatus) is investigated. The pulse jam consists of a sequence of pairs of identical short pulses with a pulse spacing of 50 µs in each pair and with a pair repetition rate of 300 s−1. The...
Abstract A review is presented of numerous experimental data that exhibit anomalies in sound transmission through the water-sand interface of the sea bottom at overcritical angles of incidence. These data are complemented with those of in-sea experiments performed with a side-scan sonar for low...
Abstract Possible spatial resolution of a passive acoustic thermal tomograph is evaluated in numerical experiments. A criterion for the evaluation of this parameter is proposed. The criterion is based on the formation of a dip between two reconstructed temperature peaks with increasing distance...
Abstract Sound scattering by random volume inhomogeneities (fluctuations of the refraction index in a medium) with an arbitrary anisotropy is considered using the small perturbation method (Born’s approximation). Surfaces (boundaries) of the inhomogeneities are deemed to be fractal ones: the...
Abstract The possibility of determining the relaxation time of cholesteric liquid crystals with a large helix pitch from the parameters of acoustic streaming is demonstrated experimentally.
Abstract For practical-purpose studies in underwater acoustics, a new method is proposed to determine the bottom reflection coefficient on the basis of multiple bottom-surface reflections. The method allows one to obtain the angular dependence of the bottom reflection coefficient at grazing...
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