Novel ultrasonic transducer

The utility model discloses a novel ultrasonic transducer, including matching layer, piezoelectric layer and back sheet, the piezoelectric layer with be equipped with loud impedance layer between the back sheet, loud impedance layer is greater than for the acoustic impedance the layer of the acoustic impedance of piezoelectric layer, just the thickness of piezoelectric layer is quarter wavelength basically. The utility model discloses between ultrasonic transducer's piezoelectric layer and back sheet, add the loud impedance layer of one deck for the thickness vibration of piezoelectric layer in order to be about quarter wavelength like this, had both improved the SNR and the bandwidth of whole transducer, had reduced ultrasonic transducer's impedance again, did benefit to and matchd with ultrasonic testing system.