The present disclosure relates to a signal processing apparatus and a signal processing method for increasing the precision of probe movement calculations.An A array transducer is a one-dimensional array transducer that is a conventional array transducer. A B array transducer and a C array transducer are connected to both ends of the short side of the A array transducer (the right and left ends in the drawing), so that the array direction of the respective transducers in the A array transducer is perpendicular to the array direction of the respective transducers in the B array transducer and the C array transducer. The present disclosure can be applied to a signal processing apparatus that generates an ultrasound image from signals supplied from a probe that captures ultrasound images, and displays the generated ultrasound image.
