Features of radiation of powerful vibrators on inhomogeneous soils (high-speed, flooded, permafrost) are analyzed in this chapter. It is shown that, when emitted on high-speed ground, the effective range of emission becomes narrowband and shifts to the high-frequency region. On low-speed soils, the emission spectrum is broader, and correlograms in the far zone are more permissible and have a high signal-to-noise ratio. The role of resonances in the vibrator/subsoil system in the formation of powerful multiple and half-multiple harmonics is established. The possibility of using the latter for expanding the effective frequency range of vibrator emission and obtaining correlograms in the near and far zones is shown. It is established that when summing up repeated sessions of vibrators, the resolution of correlograms increases and the signal-to-noise ratio increases.
