Sennheiser Electronic Gmbh & Co Kg

Sennheiser Electronic Kg

Klaus Willemsen

Matthias Fehr

Sven Dortmund

Egon F Warnke

There is provided an antenna unit comprising a first metallic main surface () for placement of the antenna unit on a substantially planar surface, a second main surface (), a first end and a second end. The first end has a first and a second metallic side surface () and a connection () for a feed line of the antenna unit. The second end has a third side surface (). The second main surface is smaller than the first main surface. The first, second and third side surfaces extend between the first and second main surfaces.

Antenna unit for wireless audio transmission

An infrared headphone with supplemental microphones to aid the hearing impaired allowing the user to hear the significant sounds from the ambient surroundings. In order to suppress the sound intensity of the user's own voice the invention provides for microphones arranged at a distance from each other on a supporting elbow in such a way that when they are mounted on the head of the user they are symmetrically arranged with respect to a median plane of the user's head and the signals emitted from the microphones are conducted in counter-phase with respect to each other.

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Wedemark, Germany

Klaus Willemsen