| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology of informing a driver of a section which is danger to travel.SOLUTION: An acquisition part 12 acquires a travel sound data that is collected with a microphone mounted on a vehicle. A memory part 18 stores a plurality of pieces of reference data which is to be compared with the travel sound data acquired by the acquisition part 12, being a plurality of pieces of reference data corresponding to a case in which speeds of vehicles are different from each other. An output part 20 outputs a warning in a case where any one of the plurality of pieces of reference data stored in the memory part 18 and the travel sound data acquired by the acquisition part 12 is close to each other by an amount less than a threshold value.SELECTED DRAWING: Figure 3 |
