Nonlinear multi-frequency generation for underwater application

This study examines the feasibility of designing a multi-frequency acoustic surveying tool based on the saturation effect. The transmitter is driven by a high-power single tone-burst: nonlinear propagation creates the beams at harmonic frequencies. A simple pseudo one-dimensional model is used to estimate the expected on-axis harmonic levels generated with a rectangular aperture. First measurements are reported and compared with the estimations.