The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 25, 1986
Filed:
May. 10, 1984
Applicant:
Inventors:
Werner Fidi, Baden, AT;
Friedrich Richter, Klosterneuburg, AT;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
181129 ; 1791 / ;
Abstract
An ear piece for a sound producing device such as a headset comprises an annular ear cushion with at least one part of an elastic, soft, sound permeable foam and at least one other part of a sound permeable layer which is thin in relation to the overall thickness of the air cushion and has a defined acoustic impedance for low and medium frequencies of the audibility range. The ear cushion acts as a frictional resistance with a central portion defining coupling space from the sound producing device to the ear and representing an acoustic connection through the sound producing device to the air.