Simple 3D model for free use. FBX Once you open it in Blender, there is a logo in front. Sketchfab shows it all black. An ultrasound probe (or transducer) is the essential component of an ultrasound machine. It emits high-frequency sound waves and receives their echoes to create real-time images of internal tissues. It uses piezoelectric crystals to convert electrical energy into mechanical energy and vice versa. Transducers come in various shapes and frequencies depending on the examination.