4. A vehicle-mounted device comprising: a reception unit configured to perform wireless communication with a roadside apparatus to receive provided information; an operation unit configured to prohibit an audio output of a speech signal or release the prohibition of the audio output; a first storage unit configured to store setting information when audibly outputting the speech signal in response to audio instruction information included in the provided information received by the reception unit; a second storage unit configured to store utterance prohibition information to be used to prohibit the utterance of the audio instruction information by the operation unit; a control unit configured to cause the provided information to be audibly outputted; and an audio output unit configured to audibly output, wherein the control unit has judgment means for judging whether the audio instruction information included in the provided information received by the reception unit coincides with the utterance prohibition information stored in the second storage unit and release means for releasing the utterance prohibition if it is judged by the judgment means that the audio instruction information coincides with the utterance prohibition information and the release of the utterance prohibition is instructed by the operation unit.
4. A vehicle-mounted device comprising: a reception unit configured to perform wireless communication with a roadside apparatus to receive provided information; an operation unit configured to prohibit an audio output of a speech signal or release the prohibition of the audio output; a first storage unit configured to store setting information when audibly outputting the speech signal in response to audio instruction information included in the provided information received by the reception unit; a second storage unit configured to store utterance prohibition information to be used to prohibit the utterance of the audio instruction information by the operation unit; a control unit configured to cause the provided information to be audibly outputted; and an audio output unit configured to audibly output, wherein the control unit has judgment means for judging whether the audio instruction information included in the provided information received by the reception unit coincides with the utterance prohibition information stored in the second storage unit and release means for releasing the utterance prohibition if it is judged by the judgment means that the audio instruction information coincides with the utterance prohibition information and the release of the utterance prohibition is instructed by the operation unit. 6. The information distribution system according to claim 4 , wherein the setting information is at least one of a talker of a pitch of the provided information, and if the at least one of the talker and the pitch of the audio instruction information included in the provided information received by the reception unit is different from the setting information stored in the first storage unit, the control unit changes the setting information.