A transducer assembly operable to transmit ultrasonic energy in a desired direction towards a zone adapted to be acoustically coupled to an object or area of interest, the assembly comprising:- a transducer layer；- a backing material disposed behind said transduction material with respect to the desired direction；- a back-matching layer disposed between the transducer layer and the backing material to reflect towards said transducer layer part of the ultrasonic energy directed from the transducer layer to the backing material.The back-matching material has an impedance less that the impedance of the transducer layer and the transducer layer has a thickness greater than a 1/4 of the wavelength of the ultrasound waves the assembly is configured to generate. A process for manufacturing a transducer assembly is also disclosed.
