Patent · US Expired

Microphone diaphragm

US4508192A · kind A · utility

2Cited by

2References

7Claims

0Family size

Assignee

AKG Akustische u. Kino-Gerate Gesellschaft m.b.H. · AT

Inventors

Werner Fidi · Baden-Baden, DE
Richard Pribyl · Fischamend, AT
Konrad Wolf · Walzbachtal, DE

Key dates

Filing date	Mar 28, 1983
Grant date	Apr 2, 1985
Priority date	—
Expiry date	Mar 28, 2003

Classification

Technology area (CPC H)Electricity
CPC primaryH04R7/02
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A diaphragm for electrostatic and electrodynamic microphones which has a distinct directional pattern comprises a taut diaphragm having a thickness of less than 8 microns and a diameter of 10 millimeters at most and which is made of an elastically extensible rubber base material which has a natural frequency of 1,200 Hz to 1,500 Hz at most. A diaphragm is particularly for microphones of the cardioid, supercardioid and hypercardioid and figure eight type.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.