Electroacoustic transducer

US9968966B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Andre Gerlach · Leonberg, DE
• David Bartylla · Leonberg, DE

Key dates

• Filing date: May 26, 2014
• Grant date: May 15, 2018
• Expiry date: Apr 28, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S2015/938
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An electroacoustic transducer includes: a housing; an oscillating structure including at least one disk-shaped piezoelectric element having first and second surfaces; an acoustic transmitter; and electrical connecting element contacting electrodes of the piezoelectric element. The acoustic transmitter has parallel first and second surfaces, which first surface is joined to the first surface of the piezoelectric element, and which second surface is suitable for emitting and/or receiving sound waves. The distance between the second surface of the acoustic transmitter and the second surface of the piezoelectric element corresponds to ¼ of the resonance oscillation wavelength of the oscillating structure. The piezoelectric element is connected to the housing with the aid of a bearing structure which allows transverse strains of the piezoelectric element.