Notification device, notification method, recording medium, and notification system
A notification device includes: an outputter that outputs a sound according to a predetermined condition after outputting notification start information, when the predetermined condition is met; an obtainer that obtains notification start information output from another notification device; and a controller that controls whether to cause the outputter to output the sound, based on timing at which the notification start information from the other notification device is obtained.
1 . A notification device comprising:
an outputter that outputs a sound according to a predetermined condition after outputting notification start information, when the predetermined condition is met;
an obtainer that obtains notification start information output from an other notification device; and
a controller that controls whether to cause the outputter to output the sound, based on timing at which the notification start information from the other notification device is obtained.
2 . The notification device according to claim 1 , wherein
the notification device is communicably connected to a server via a network,
the notification device further includes a receiver that receives a notification instruction from the server, and
the predetermined condition is that the receiver receives the notification instruction.
3 . The notification device according to claim 1 , wherein
when the timing is included in a period before the outputter has output the notification start information, the controller prevents the outputter from outputting the sound.
4 . The notification device according to claim 3 , wherein
when the timing is included in a period before the outputter has output the notification start information, the controller prevents the outputter from outputting the notification start information.
5 . The notification device according to claim 2 , wherein
when the timing is included in a period before the receiver receives the notification instruction, the controller does not receive the notification instruction until a first time period elapses from the timing.
6 . The notification device according to claim 1 , wherein
when the timing is included in a period from when the outputter has output the notification start information until when a second time period elapses, the controller causes the outputter to output the sound.
7 . The notification device according to claim 1 , wherein
when the timing is included in a period after a second time period elapses from when the outputter has output the notification start information, the controller prevents the outputter from outputting the sound.
8 . The notification device according to claim 1 , wherein
the outputter outputs a jingle as the notification start information, and
the obtainer obtains the notification start information from the other notification device by detecting the jingle in a space around the notification device.
9 . A notification method comprising:
starting sound output process, when a predetermined condition is met, the sound output process being outputting a sound according to the predetermined condition after outputting notification start information;
obtaining notification start information output from an other notification device; and
controlling whether to output the sound, based on timing at which the notification start information from the other notification device is obtained.
10 . A non-transitory computer-readable recording medium having recorded thereon a program for causing a computer to execute the notification method according to claim 9 .
11 . A notification system comprising:
a server; and
a first notification device and a second notification device communicably connected to the server, wherein
the first notification device includes:
a first receiver that receives a notification instruction from the server; and
a first outputter that outputs a sound according to the notification instruction received, after outputting notification start information, when the first receiver receives the notification instruction, and
the second notification device includes:
a second receiver that receives the notification instruction from the server;
a second outputter that outputs a sound according to the notification instruction received, when the second receiver receives the notification instruction;
an obtainer that obtains notification start information output from the first notification device; and
a controller that controls whether to cause the second outputter to output the sound, based on timing at which the notification start information from the first notification device is obtained.