Double-channel, frequency-steered acoustic transducer with 2-D imaging capabilities.
Baravelli E, Senesi M, Ruzzene M, De Marchi L, Speciale N. Double-channel, frequency-steered acoustic transducer with 2-D imaging capabilities. IEEE Trans Ultrason Ferroelectr Freq Control. 2011 Jul; 58(7):1430-41.