Body vibration pickup

US4258229A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Albert Eggert · Berlin, DE
• Wolfgang Schmidt

Key dates

• Filing date: Oct 19, 1979
• Grant date: Mar 24, 1981
• Expiry date: Oct 19, 1999

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04R17/02
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

In a body vibration pickup including a housing, a piezoelectric element disposed in the housing and a vibration conductor mounted to conduct sound vibrations of a body to the piezoelectric element, a diaphragm is disposed in the housing between the piezoelectric element and the vibration conductor in an electrically conductive manner, and a resilient cast mass is disposed in the housing and the diaphragm, the piezoelectric element and the part of the vibration conductor which extends into the housing are embedded therein.