Abb Research Ltd.

Abb Technology Ag

Phonak Ag

Siemens Schweiz Ag

Abb Schweiz Ag

Daniel Müller

Bernhard Doser

Felix Greuter

Erich Dittli

Walter Schmidt

André Lucien Ochsenbein

Christoph Leist

Daniel Neeser

Bruno Wenger

Dieter Fuechsle

Peter Gysel

Marlene Ljuslinder

August Kalin

André Ochsenbein

Exemplary embodiments are directed to a device with overvoltage protection that includes a varistor which can be connected by a first connection via a first line to high-voltage potential in a circuit arrangement, while a second connection is connected to ground via a second line. Furthermore, an additional impedance is provided, which can be connected between the second connection and ground or the first connection and the high voltage, or is mounted fixed in this position. The corresponding line can be interrupted by a switching arrangement. In order to test the withstand voltage of the circuit arrangement, at least one of the first and second line is interrupted and an additional impedance is inserted. A test voltage is applied to the circuit arrangement. After the overvoltage test, the interruption in at least one of the first and second lines is removed again.

Device with overvoltage protection and method for its testing

The present invention provides a hearing device comprising a first component () with a housing () comprising at least one electronic module, said housing () being adapted to be carried outside of or at the human body and a second component () to be inserted either partially or fully into an ear canal of a human body, said second component () comprising a shell (). The hearing device further comprises connecting means connecting both mechanically and electrically said first and said second component (), comprising a tube () with electric wire arranged within the tube () and two fasteners () being arranged at each end of said tube (). Said first fastener (), being adapted to detachably connect said second component () with said connecting means, comprises a receiving housing or compartment, adapted to contain at least a part of a receiver () to be placed within said second component (). By providing a detachable fastener () at least at one end of the tube () acting as connecting means between the first and second component () of the hearing device, the connecting means may be easily detached from either the first or the second component () of the hearing device.

Connector system for receivers of hearing devices

The surge arrester contains a tubular encapsulation () of electrically conductive material that is filled with an insulating gas, an insulator () that is held on the encapsulation () and serves for supporting a current conductor (R) that is connected to a high voltage, an active part (R) that is arranged in the encapsulation () and comprises at least one varistor column () that is aligned along the encapsulation axis (A) and a field control element (). In order to maintain the manufacturing costs of this arrester at a low level, the field control element () and a first plug-type contact () of a plug connection () are held on the current conductor (R) of the insulator (), and a high-voltage electrode () of the varistor column () that is connected in an electrically conductive fashion to the current conductor (R) via the plug connection () contains the second plug-type contact () of the plug connection ().

Gas-insulated surge arrester

Echo canceler. A circuit arrangement for the cancellation of echo signals, wherein in the received path, an analog/digital converter is connected with a first adder and a second adder is interposed after the analog/digital converter, with the estimated echo signal being divided into first and second portions, whereby the first portion is transmitted to the first adder and the second portion is transmitted to the second adder for the production of the received signal. In a further embodiment, a third adder is interposed between the analog/digital converter and the second adder, via which the output signal of a compensation filter is added to the signal in the received path.

Echo canceler

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Zurich, Switzerland

Daniel Müller