Notification system, notification method, control device, and recording medium

A notification method comprising:

• obtaining an audio content to be notified of and a result of sensing obtained by a microphone that detects a sound generated in a space in which a notification device is located;
• determining whether to notify of the audio content depending on whether a sound pressure of the sound generated in the space is lower than or equal to a predetermined threshold, based on a sound signal generated by the microphone as the result of the sensing;
• and
• notifying of the audio content based on a result of the determining, wherein
• the determining includes:
• determining to notify of the audio content, when the sound pressure is lower than or equal to the predetermined threshold;
• and
• determining not to notify of the audio content, when the sound pressure is higher than the predetermined threshold,
• in the obtaining the audio content, a plurality of audio contents are obtained at a plurality of timings that are different from each other, and
• the method comprises:
• determining, for each of the plurality of timings, whether a sound pressure of the sound generated in the space is lower than or equal to the predetermined threshold, based on a sound signal generated by the microphone at the timing;
• and
• causing the notification device to notify of a first audio content that has not been notified of at a timing at which the sound pressure is determined to be higher than the predetermined threshold, when (i) determining that the sound pressure is lower than or equal to the predetermined threshold after determining that the sound pressure is higher than the predetermined threshold, based on a sound signal at a first timing at which the first audio content is obtained and (ii) no portion of the first audio content is notified to the notification device at the first timing.

A control device communicably connected to a notification device, the control device comprising:

• an obtainer that obtains an audio content to be notified of and a result of sensing obtained by a microphone that detects a sound generated in a space in which a notification device is located;
• and
• a controller that performs first control of controlling notification of the audio content by the notification device depending on whether a sound pressure of the sound generated in the space is lower than or equal to a predetermined threshold, based on a sound signal generated by the microphone as the result of the sensing, wherein
• in the first control, the controller:
• causes the notification device to notify of the audio content, when the sound pressure is lower than or equal to the predetermined threshold;
• and
• prevents the notification device from notifying of the audio content, when the sound pressure is higher than the predetermined threshold,
• the obtainer obtains a plurality of audio contents at a plurality of timings that are different from each other, and
• the controller:
• determines, for each of the plurality of timings, whether a sound pressure of the sound generated in the space is lower than or equal to the predetermined threshold, based on a sound signal generated by the microphone at the timing;
• and
• causes the notification device to notify of a first audio content that has not been notified of at a timing at which the sound pressure is determined to be higher than the predetermined threshold, when (i) determining that the sound pressure is lower than or equal to the predetermined threshold after determining that the sound pressure is higher than the predetermined threshold, based on a sound signal at a first timing at which the first audio content is obtained and (ii) no portion of the first audio content is notified to the notification device at the first timing.