Patent ID: 9131310
Filing Date: 2015-09-08
Classification: A61F,H04R

Abstract:
1. A hearing protector with loudspeakers and comprising, a closed muff disposed at each ear of a user, the muff sealingly abutting against the user's head, whereby there is formed an enclosed space in the muff and around the user's ear, one loudspeaker disposed in at least one of the muffs and displaying a membrane whose one side is turned to face towards the ear of the user and whose opposing side is turned to face towards a closed volume which is defined by the membrane and an enclosure, and a drive unit for driving the loudspeaker, characterised in that the interior of the enclosure is, via at least one hole or duct in a defining wall of the enclosure, in communication with the ambient surroundings outside the closed space of the muff, wherein the total area of the hole/holes or duct/ducts lies in the range of 5.5>A>0.1 mm 2 .