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:
Apr. 30, 2019
Filed:
Sep. 01, 2017
Sennheiser Electronic Gmbh & Co. KG, Wedemark, DE;
Michael Horn, Harsum, DE;
Manfred Kurbis, Wedemark, DE;
Lars Heine, Schwulper, DE;
Raimund Staat, Burgwedel, DE;
Sennheiser electronic GmbH & Co. KG, Wedemark, DE;
Abstract
There is provided a microphone unit () for an action camera, comprising a microphone capsule () having at least one speaking hole (), and a water-tight enclosure () which water-tightly encloses the microphone capsule (). The water-tight enclosure () has a water-impermeable passive diaphragm () which can oscillate freely and which allows incoming sound to pass substantially undisturbed. The microphone unit has a head () having a plurality of holes (), the head () being provided outside the enclosure () in front of the passive diaphragm (). The microphone unit further has a foam portion () which is provided in front of the head () and has an open-pore foam. The foam portion () is in contact with the head (). The passive diaphragm () has an oscillatable minimum area of 20 mm; wherein the foam portion () has pores which are sufficiently small so that the foam portion () can suck water residues away from the holes () in the head () like a sponge. At the same time however the pores are of such a size that they cannot independently retain water so that water residues, after removal of the microphone unit () from the water, run for the greatest part out of the foam portion () downwardly under the effect of the force of gravity; wherein the foam portion () has a predominant pore density of 15 ppi to 80 ppi.