Abstract: A method for determining listener-specific head-related transfer functions is described. The method comprising the steps of: A) providing a visual representation of the head and each of the auricles, wherein for each auricle the visual representation includes visual information of the overall shape of the auricle and of anatomical components of the auricle; B) calculating, using said visual representation, three-dimensional polygon meshes, including a head mesh and independent auricle meshes, which respectively model the shapes of the head and auricles, wherein the auricle meshes (60) preferably include shape information of auricle components such as the entry (65) of the ear canal, the concha (66), the fossa (63), and the backside of the auricle (69); C) merging the polygon meshes to a three-dimensional combined mesh, in which the auricle meshes are located at proper locations with respect to the head mesh; D) calculating HRTFs based on the combined mesh.

Abstract: In a method for determining the roll attitude of a rolling flying object having a radio receiver, in particular for guiding a ballistic flying projectile/rocket having roll compensation, the aim is to determine a line of sight between a transmitting source and the antenna and to determine the roll attitude therefrom.

Abstract: A method for transmitting a permission signal for the operation of a robot is provided. In order to detect whether a permission signal gets from a manual programming unit to a robot control without disturbance, the permission signal is modulated with an auxiliary signal, whose continuous presence at the location of the robot control is monitored. If the auxiliary signal is present, the permission signals are accepted. If the auxiliary signal is no longer present, an EMERGENCY-OFF is triggered. For reasons of safety, the condition of the signal flow is also a two-channel one.