Figure 3.

The frequency response for five liquid drops, one deionized water, three dextrose/deionized water weight ratio mixtures (10%, 30%, 52%), and a 50% deionized water/glycerol weight ratio mixture: (a) At the lower null frequency f_L (location (1) of Figure 2), the loss decreases as the viscosity of the dextrose/water mixture increases. The wave signal becomes less pronounced for higher viscosity liquid. (b) At the higher null frequency f_R (location (3) of Figure 2), the loss increases as the viscosity of the dextrose/water mixture increases. The wave signal becomes more pronounced. However, the water/glycerol mixture badly dampened the signal.