Abstract: A hearing system includes at least one earpiece having a shell, an elongate retention element attached to the shell, and an insert unit. The shell has a sound tube portion carrying a soft tip for insertion into the user's ear canal, an outwardly oriented interface portion for detachably receiving the insert unit, and an engagement portion between the sound tube portion and the interface portion for engaging with the tragus/antitragus region of the ear, wherein the material and the dimensions of the retention element are such that the retention element can engage the user's concha by manual deformation by the user, and wherein the insert unit is a filter unit with at least one sound attenuation filter, or is an active electronic unit with at least a loudspeaker, and with an external electronic unit, which is worn on the user's body below the user's neck.

Abstract: A system for picking-up a user's voice, having an earpiece (10) that has a shell (12) and is to be worn at least partly in the user's ear canal (18), an elongate C-shaped bow-like retention element (14) attached to the shell for retaining the shell within the user's ear (18, 66, 68) and an ear microphone (16) oriented acoustically inwardly towards the user's ear canal for picking-up the user's voice. The material and the dimensions of the retention element are selected such that the retention element can be brought into engagement with the user's concha (68) by manual plastic deformation by the user.

Abstract: A hearing system includes at least one earpiece having a shell, an elongate retention element attached to the shell, and an insert unit. The shell has a sound tube portion carrying a soft tip for insertion into the user's ear canal, an outwardly oriented interface portion for detachably receiving the insert unit, and an engagement portion between the sound tube portion and the interface portion for engaging with the tragus/antitragus region of the ear, wherein the material and the dimensions of the retention element are such that the retention element can engage the user's concha by manual deformation by the user, and wherein the insert unit is a filter unit with at least one sound attenuation filter, or is an active electronic unit with at least a loudspeaker, and with an external electronic unit, which is worn on the user's body below the user's neck.

Abstract: A system for picking-up a user's voice, having an earpiece (10) that has a shell (12) and is to be worn at least partly in the user's ear canal (18), an elongate C-shaped bow-like retention element (14) attached to the shell for retaining the shell within the user's ear (18, 66, 68) and an ear microphone (16) oriented acoustically inwardly towards the user's ear canal for picking-up the user's voice. The material and the dimensions of the retention element are selected such that the retention element can be brought into engagement with the user's concha (68) by manual plastic deformation by the user.

Abstract: A surveying system has a sighting device and a position measuring unit. The position measuring unit includes an inertial measuring device.