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:
Sep. 08, 2015
Filed:
Apr. 27, 2009
Henrik J. Sjöman, Skillingaryd, SE;
Johan Håkansson, Växjö, SE;
Henrik J. Sjöman, Skillingaryd, SE;
Johan Håkansson, Växjö, SE;
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A hearing protector has two closed muffs () which sealingly abut against the wearer's head, so that there is formed a closed space in each muff () and about the user's ear. A loudspeaker () is disposed interiorly in the muff and has a membrane () whose one side is turned to face towards the user's ear, and whose opposing side is turned to face towards a closed volume which is defined by the membrane and an enclosure. In order to improve the base reproduction in listening to music, the interior of the enclosure is, via at least one hole or one duct, in communication with the ambient surroundings outside the closed space of the muff (). In one preferred embodiment, the enclosure comprises a capsule () which is integrated part of the loudspeaker ().