The present invention relates to a CAD/CAM system for design and manufacture of a hearing aid housing comprising a face plate and a shell that is matched to the auditory canal of a user, the system being adapted to receive and process data representing the shape of the auditory canal, forming a three-dimensional model of the shell based on the data, and outputting data representing the model for production of the shell and the face plate based on the model. Manufacture of the face plate includes at least one automatic processing step based on data from a CAD/CAM model of the hearing aid housing. For example, data relating to the circumference of the face plate may be provided to a numerically controlled machine that automatically cuts a separately manufactured face plate along the desired contour that matches the circumference of the corresponding shell. In another embodiment, the hearing aid housing is manufactured with an integrated face plate.

The present invention relates to manufacturing of a hearing aid housing comprising a face plate and a shell that is individually matched to the shape of the auditory canal of a user. Manufacture of the face plate includes at least one automatic processing step based on data from a CAD/CAM model of the hearing aid housing. For example, data relating to the circumference of the face plate may be provided to a numerically controlled machine that automatically cuts a separately manufactured face plate along the desired contour that matches the circumference of the corresponding shell. In another embodiment, the hearing aid housing is manufactured with an integrated face plate.

For the protection of an in-the-ear hearing aid against contamination by ear wax through the acoustic outlet port (34a) or a vent, a replaceable ear wax guard (36) is inserted in the aid and comprises an essentially tubular element with a through-going cavity and an abutment collar in one end for sealing abutment against the hearing aid housing (31). For an easy and safe insertion and removal of the ear wax guard (36), an applicator is used, which in one end has a smooth pin for introduction in the through-going cavity of the ear wax guard (36) and in the other end a harpoon-shaped catch member. For mounting of the ear wax guard (36) a hose or tube member serving as acoustic outlet canal (34) is connected to an abutment collar (33) in abutment with the outside of the hearing aid. The abutment collar is designed with oversize standard dimensions and adapted to an individually user-adapted hearing aid housing by preparation of its periphery edge.

The present invention relates to a hearing aid for insertion in the auditory canal, comprising a hearing aid housing and a face plate and a shell that is matched to the auditory canal of a user and has a tightening protrusion that extends along the surface of the shell and at least partly encircles the shell thereby providing a tight seal against the auditory canal wall when the shell is inserted in the auditory canal.

Hearing aid with a microphone, a transmission section (2) for signal processing with a housing (3) containing an output transducer, a battery compartment containing a battery (4), a cover (5) articulated at the housing or a battery lid (5a) articulated at the housing so that it can be pivoted, said cover or lid serving to close off the battery compartment, an electronic control logic (6), as well as a contact arrangement (7) which can be actuated by pressing on the cover (5) in closed position or the battery lid (5a) in closed position and by means of which the control logic can be activated. This contact arrangement can be activated by a spring-loaded movement of the cover (5) or battery lid (5a) beyond the normal closing position.