Sennheiser Electronic Gmbh & Co Kg

Manfred Kurbis

Lars Heine

André Grandt

Raimund Staat

Michael Horn

Dela Bahlke

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.

Microphone unit for an action camera

There is provided a safety helmet () having an outer helmet shell (), shock-absorbing material () and an electroacoustic transducer () for the delivery of a sound signal. The shock-absorbing material () has an outside () and is arranged within the outer helmet shell () with the outside () adjacent to the outer helmet shell (). The electroacoustic transducer () is arranged in that case at the outside () of the shock-absorbing material ().

Helmet and apparatus for active noise suppression

There is provided a microphone unit comprising a hoop () with a first and second end (), a microphone capsule () at the first end () and a connection plug () at the second end () of the hoop (). The hoop () has a flexible or bendable tubular hoop and is bent or is bendable to form a loop.

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Wedemark, Germany

Manfred Kurbis