Patent · US Expired

Electro-acoustic transducer

US5030872A · kind A · utility

2Cited by

6References

6Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Gerd Boehnke · Bottrop, DE
Stefan Pieper · Haltern, DE

Key dates

Filing date	Aug 3, 1989
Grant date	Jul 9, 1991
Priority date	—
Expiry date	Aug 3, 2009

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2499/11
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An electro-acoustic transducer having a circular transducer plate arranged in a transducer housing, clamped between two mounting members at its edge region, is provided with a piezoelectric layer. At least one seating region of the mounting member is of a rotationally asymmetrical shape to attenuate partial oscillations of a higher order. The electro-acoustic transducer is usable as a transducer for telephones.

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