Christof Haertl

Programmable hearing aid means worn in the auditory canal

For data exchange with a programmable hearing aid worn in the auditory canal, an electrical line is provided that contains leads in electrical contact with a circuit in the hearing aid and which is mechanically attached to the hearing aid so as to serve as an extractor for the hearing aid. The free end of the electrical line carries a signal receptor, such as a plug or socket or a wireless receiver with a gripping surface.

Method and apparatus for producing an ear impression

On the basis of a hollow die including over-shell and a cap drawn onto a proximal connector of the die, an ear impression is produced directly in the auditory canal that is filled with ear impression material. Displaced ear impression material thereby flows through a channel in the cap into the hollow interior of the die. A negative is produced from the ear impression together with a screwed-on fixing star, this negative containing impressions of the points of the fixing star. After injection of otoplastic material and repositioning of a fixing star with a die, over-shell and cap into the fixing depressions, a finished otoplastic shell can then be produced from the negative.

Hearing aid device to be worn in the ear

In an exemplary embodiment, a first shell has the contours of an individually fitted ear adapter and the second shell has a carrier plate penetrated by openings for adjustment elements of the hearing aid structure. In known devices, the covering of the cavity of the ear adapter has proven unfavorable both cosmetically as well as mechanically. In order to alleviate this, the disclosure provides that the inside space of a cover plate be provided with an internally disposed cavity for the carrier plate whose outside dimensions are smaller than the smallest dimensions to be expected for an individually fitted ear adapter, and that the second shell is significantly larger, so that, after application to the first shell, laterally projecting parts are cut off. The disclosed structure is particularly suited for employment given in-ear hearing aids.

Apparatus for srewing a cover onto a screw neck of a hearing aid

A rotary shaft is provided with at least two pins at its one end, these two pins fitting into two holes of the cover. The other end of the rotary shaft carries a polygonal screw pin for screwing on the adaptor.