Figures & data
Figure 1. Electrical impedance of air-backed piezoceramic transducer with matching layer. Solid curve, no matching layer; chained curve, with a matching layer optimised for the power factor; dotted curve, with a conventional matching layer.
Figure 2. Steering focus of array transducer for thermal treatment. (A) Steering angle needed for lateral broadening of heat deposition pattern. (B) Number of waves transmitted at a time by array transducer.
Figure 3. Electrical impedance of air-backed piezoceramic disc-shaped transducer element.
Figure 4. Electrical impedance of air-backed piezocomposite transducer element.
