Patent ID: 6825594
Filing Date: 2004-11-30
Classification: B06B,G10K

Abstract:
An ultrasonic transducer, comprising:a housing, in which an ultrasonic oscillator is secured with at least one of a nonpositive and positive fit; and at least four layers with acoustic wave impedances that vary to alternating degrees, adapted to achieve the fit, wherein the layers are arranged such that the ultrasonic oscillator is embedded in a first relatively acoustically soft layer with at least one flexible insulating material as a component part, wherein the first layer is surrounded by a second layer which includes at least one relatively acoustically hard material, wherein a third relatively acoustically soft layer surrounds the second layer at least in the direction directed from the ultrasonic oscillator radially outward toward the housing, includes at least one plastic in foam form, the density of which is always less than 0.6 kg/dm3, and wherein the third layer is surrounded at least partially by a fourth layer with a relatively high acoustic wave impedance.