Abstract: A speaker device according to an embodiment includes a vibration element, a driving unit, and a panel. The driving unit applies, to the vibration element, a driving signal where a carrier wave in an ultrasonic wave band is modulated by a sound signal in an audible wave band. The panel is provided with the vibration element and arranged in such a manner that a driving signal is applied to such a vibration element by the driving unit to form a vibration region and first and second ultrasonic waves that are generated from such a vibration region and travel in mutually different directions travel toward respectively different users.

Abstract: A speaker device according to an embodiment includes a vibration element, a driving unit, and a panel. The driving unit applies, to the vibration element, a driving signal where a carrier wave in an ultrasonic wave band is modulated by a sound signal in an audible wave band. The panel is provided with the vibration element and arranged in such a manner that a driving signal is applied to such a vibration element by the driving unit to form a vibration region and first and second ultrasonic waves that are generated from such a vibration region and travel in mutually different directions travel toward respectively different users.

Abstract: There is provided a content reproduction device. An acquisition unit configured to acquire driving information indicating whether a vehicle driving is a manual driving in which a driver should execute a driving operation or an automatic driving in which the driver does not have to execute the driving operation. A change unit that is configured to determine whether the vehicle driving is to be switched from the automatic driving to the manual driving on the basis of the driving information acquired by the acquisition unit and that, when the vehicle driving is switched from the automatic driving to the manual driving, changes at least one of a content to be reproduced and a setting about reproduction.

Abstract: A communication system includes: a plurality of mobile terminals; and a linked apparatus that works in concert with the plurality of mobile terminals. The linked apparatus is configured to establish a wireless connection to a selected one of the plurality of mobile terminals. The selected one of the plurality of mobile terminals is designated as a relaying apparatus that relays communications. The plurality of mobile terminals includes: a first mobile terminal that serves as the relaying apparatus before a change of selection of the relaying apparatus; and a second mobile terminal that serves as the relaying apparatus after the change of selection of the relaying apparatus.

Abstract: A communication system includes: a plurality of mobile terminals; and a linked apparatus that works in concert with the plurality of mobile terminals. The linked apparatus is configured to establish a wireless connection to a selected one of the plurality of mobile terminals. The selected one of the plurality of mobile terminals is designated as a relaying apparatus that relays communications. The plurality of mobile terminals includes: a first mobile terminal that serves as the relaying apparatus before a change of selection of the relaying apparatus; and a second mobile terminal that serves as the relaying apparatus after the change of selection of the relaying apparatus.