Sound of ultrasound sensor

Abstract

A sound or ultrasound sensor having a radiation characteristic with a preferably small beam angle and producing very little interference signals, including a pot-shaped housing closed at its bottom end by a floor, a piezoelectric element for producing and/or receiving sound or ultrasound through the floor, a matching layer between the piezoelectric element and the floor, and a metal ring gripping around the matching layer with an interlocking fit.

Dependencies are inferred from the claim text.