Abstract: An ultrasound transducer has a housing, at least one piezoelectric element, and a membrane emitting or receiving ultrasound. A mass ring is arranged at an edge portion of the membrane for the dampening of undesirable resonances. To provide an ultrasound transducer with the smallest possible dimensions, the ultrasound transducer is configured as a lengthwise or longitudinal oscillator, the mass ring is separate from the membrane and is joined to both the edge portion of the membrane and the inside of the housing. A ring-shaped dampening element is attached to the inside of the housing and is located next to the mass ring.

Abstract: An ultrasound converter, especially of the axial oscillating type, with at least one piezoelectric element disposed between two tensioning segments and at least one tensioning member which prestresses the piezoelectric element via the tensioning segments. The tensioning element is a ring-shaped tensioning spring the walls of which have at least one peripheral recess.

Abstract: The invention relates to an ultrasound converter, especially of the axial oscillating type, with at least one piezoelectric element disposed between two tensioning segments and at least one tensioning member which prestresses the piezoelectric element via the tensioning segments. The tensioning element is a ring-shaped tensioning spring the walls of which have at least one peripheral recess.