{
  "$type": "site.standard.document",
  "description": "A navigation apparatus 100 includes a current position information acquisition unit (a self-position acquisition unit 42) that acquires current position information, and a travel direction determination unit (for example, a route search unit 44) that determines a travel direction based on the…",
  "path": "/patents/981409",
  "publishedAt": "2013-12-04T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/206",
    "NEC CASIO MOBILE COMM LTD [JP]"
  ],
  "textContent": "A navigation apparatus 100 includes a current position information acquisition unit (a self-position acquisition unit 42) that acquires current position information, and a travel direction determination unit (for example, a route search unit 44) that determines a travel direction based on the acquired current position information and destination position information. The navigation apparatus 100 further includes a sound unit that outputs a sound (for example, a parametric speaker 30), and a sound control unit 41 that controls the sound unit so that the sound can be heard to the user from the travel direction.",
  "title": "NAVIGATION DEVICE"
}