LABORATORY-SCALE MEASUREMENT OF SCATTERING FROM MODELED ARCTIC ICE RIDGES

An experiment is performed to measure acoustic scattering from scale m odelled ice ridges in both specular (forward) and non-specular (backwa rd) directions, for comparison with predictions from theoretical model s. The experiment uses a 100 kHz transmitter emitting sinusoidal burst s. An array of miniature transducers is used to measure the scattered field as a function of scattering angle. Experimental results are obta ined for scattering from different types of rods simulating ice ridges , and also the reflection coefficient from an acrylic block. The resul ts show good agreement with the Twersky model predictions. This experi ment establishes an effective technique, using scale models in the lab oratory, to compare theoretical predictions and field experimental dat a.