METHOD OF GENERATING SHORT ACOUSTIC PULSES DURING PARAMETRIC EMISSION AND VERSIONS OF DEVICE FOR IMPLEMENTING SAID METHOD Russian patent published in 2010 - IPC G01S15/00 G01S7/524 

FIELD: physics.

SUBSTANCE: method involves independent generation of first and second radio pulses of pumping signals with different filling frequency and duration of τ₁ and τ₂ respectively, amplification of these pulses and their emission using an acoustic antenna - pumping signal source, as well as summation of the radio pulses of the pumping signals and generation of differential and summation frequency after nonlinear interaction of pulses in the propagation medium. The second radio pulse of the pumping signal is delayed relative the onset of the first radio pulse of the pumping signal by time T=τ₁-τ_F, where τ_F is the given pulse duration at differential and summation frequency generated in the medium after nonlinear interaction of the first and second radio pulses of the pumping signals. The conditions τ₂≥τ_F and τ_1,2≥10/f_1,2, where f_1,2 is pumping frequency, are also satisfied.

EFFECT: possibility of emitting non-distorted pulses of arbitrary duration, including duration into part of the period at differential and summation frequencies.

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