NAVIGATION DEVICE, NAVIGATION-DEVICE-CONTROL METHOD, PROGRAM OF NAVIGATION-DEVICE-CONTROL METHOD, AND RECORDING MEDIUM RECORDING PROGRAM OF NAVIGATION-DEVICE-CONTROL METHOD

摘要

A navigation device that transmits data on a user's voice to a communication party, the voice data being acquired by a microphone, receives data on the communication party's voice, and offers the communication-party-voice data to the user is provided. The navigation device includes a voice-data-generation unit that generates guide-voice data, a voice-output unit that offers a guide voice to the user, a voice-data-analysis unit that measures a pitch of the communication party's voice by analyzing the communication-party-voice data, and a voice-data-variable unit that makes a pitch of the guide voice variable, so as to make the difference between the pitches of the communication party's voice and the guide voice significant on the basis of the analysis result when the communication party's voice and the guide voice are offered to the user at the same time.