Patent · US Expired

Closed headphones with transducer system

US6934401B2 · kind B2 · utility

4Cited by

5References

5Claims

0Family size

Assignee

Sennheiser electronic GmbH & Co. KG · DE

Inventors

Axel Grell · Großburgwedel, DE
Kornelia Kaddig · Winsen (Aller), DE

Key dates

Filing date	Aug 22, 2002
Grant date	Aug 23, 2005
Priority date	—
Expiry date	Aug 22, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2400/11
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Headphones of various designs and types of construction, in particular also closed headphones, have been known for a long time. Headphones of the type mentioned above should have the desired frequency response in all frequency positions and, in particular, this frequency response should be as linear and uniform as possible in the lower frequency range in order to allow good transmission in low frequencies as well. It is the object of the invention to simplify the damping of the fundamental resonance of transducer systems, to improve quality and to save costs. Closed headphones with an acoustic transducer with a diaphragm system which separates a front volume from a rear volume, the rear volume being so small that it does not act as a spring in the range of the fundamental resonance of the transducer system.

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