4. An audio guidance system including a speech information center having a center-side storing means storing speech information in a plurality of languages and a center-side communication means for performing communication with outside and an electronic apparatus capable of communicating with the center-side communication means, the electronic apparatus comprising: a position detecting means for detecting a position of the electronic apparatus; a specific information storing means storing information specific to the electronic apparatus; an electronic apparatus-side communication means for communicating with the center-side communication means; an electronic apparatus-side storing means for storing speech information used for audio guidance; a speech output means for providing audio guidance using the speech information stored in the electronic apparatus-side storing means; an updating means communicating with the center-side communication means through the electronic apparatus-side communication means to update the speech information in the electronic apparatus-side storing means by acquiring speech information in a language corresponding to the position information, speech information in a language corresponding to destination information of the electronic apparatus determined from the specific information, and speech information in a language corresponding to user information of the electronic apparatus determined from the specific information from the center-side storing means; and an instruction means for allowing the user to instruct priority of the position information, the destination information and the user information, when the updating means uses pieces of information for updating.
4. An audio guidance system including a speech information center having a center-side storing means storing speech information in a plurality of languages and a center-side communication means for performing communication with outside and an electronic apparatus capable of communicating with the center-side communication means, the electronic apparatus comprising: a position detecting means for detecting a position of the electronic apparatus; a specific information storing means storing information specific to the electronic apparatus; an electronic apparatus-side communication means for communicating with the center-side communication means; an electronic apparatus-side storing means for storing speech information used for audio guidance; a speech output means for providing audio guidance using the speech information stored in the electronic apparatus-side storing means; an updating means communicating with the center-side communication means through the electronic apparatus-side communication means to update the speech information in the electronic apparatus-side storing means by acquiring speech information in a language corresponding to the position information, speech information in a language corresponding to destination information of the electronic apparatus determined from the specific information, and speech information in a language corresponding to user information of the electronic apparatus determined from the specific information from the center-side storing means; and an instruction means for allowing the user to instruct priority of the position information, the destination information and the user information, when the updating means uses pieces of information for updating. 7. The audio guidance system according to claim 4 , wherein: the specific information storing means stores destination information and user information of the electronic apparatus as part of the specific information; the updating means determines a language corresponding to the destination information and the user information stored in the specific information storing means and transmits a request signal to the speech information center with the electronic apparatus-side communication means to request the center to transmit speech information in a language thus determined; and the speech information center transmits speech information in the language corresponding to the request signal to the electronic apparatus with the center-side communication means.