{
  "$type": "site.standard.document",
  "description": "A personal navigation system is disclosed, comprising a hearing device configured to be head worn and having loudspeakers for emission of sound towards the ears of a user and accommodating an inertial measurement unit positioned for determining head yaw, when the user wears the hearing device in…",
  "path": "/patents/981284",
  "publishedAt": "2013-12-04T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/20",
    "GN STORE NORD AS [DK]"
  ],
  "textContent": "A personal navigation system is disclosed, comprising a hearing device configured to be head worn and having loudspeakers for emission of sound towards the ears of a user and accommodating an inertial measurement unit positioned for determining head yaw, when the user wears the hearing device in its intended operational position on the user's head, a GPS unit for determining the geographical position of the user, a sound generator connected for outputting audio signals to the loudspeakers, a pair of filters with a Head-Related Transfer Function connected in parallel between the sound generator and the loudspeakers for generation of a binaural acoustic sound signal emitted towards the eardrums of the user and perceived by the user as coming from a sound source positioned in a direction corresponding to the respective Head-Related Transfer Function, and a processor configured for determining a direction towards a desired geographical destination with relation to the determined geographical position and head yaw of the user, controlling the sound generator to output audio signals, and selecting a Head-Related Transfer function for the pair of filters corresponding to the determined direction towards the desired geographical destination so that the user hears sound arriving from the determined direction.",
  "title": "A personal navigation system with a hearing device"
}