Acoustic diode

US4618796A · kind A · utility

Assignee

• RICHARD WOLF GMBH · DE

Inventor

• Rainer Riedlinger · Karlsruhe, DE

Key dates

• Filing date: Oct 2, 1985
• Grant date: Oct 21, 1986
• Expiry date: Oct 2, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S310/80
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

A sonic transmitter has placed in front of it or in its acoustic beam path, an acoustic diode comprising at least two peripherally secured foils in mutual contact, the foils having opposed surfaces with a degree of adhesion and/or cohesion such that they may be pulled apart beyond a threshold value which may be acted upon--of negative sound pressure thus suppressing negative sound pulses, whereas positive sound pressures may be transmitted at almost unaltered levels in view of the existing mechanical contact of the foils.