NOISE CANCELLING APPARATUS, NOISE CANCELLING METHOD, AND PROGRAM
A noise suppression technique which allows a user to recognize that a specific event occurs when the event that the user needs to be aware of occurs even during a process of suppressing noise around the user is provided. When the noise around the user includes a sound originating from a predetermined event (hereinafter referred to as “event sound”), a noise suppression device allows a user to recognize that the event occurs.
1 . A noise suppression device, in which, when noise around a user includes a sound originating from a predetermined event (hereinafter referred to as “event sound”), the user is made aware that the event occurs.
2 . The noise suppression device according to claim 1 , comprising:
a situation identification result generation circuitry which generates a situation identification result indicating whether the event occurs around the user from sensor data acquired using a sensor;
a notification signal generation circuitry which generates a notification signal informing the user that the event occurs when the situation identification result indicates that the event occurs around the user; and
an erasure sound signal generation circuitry which generates an erasure sound signal for erasing the noise from the user's listening sound signal acquired using one or more microphones.
3 . The noise suppression device according to claim 1 , comprising:
a situation identification result generation circuitry which generates a situation identification result indicating the likelihood that the event occurs around the user from sensor data acquired using a sensor;
an adjustment information generation circuitry which generates information (hereinafter referred to as “adjustment information”) regarding a relative magnitude of the event sound erasure sound for erasing the event sound with respect to the erasure sound for erasing the noise determined in accordance with the value of the situation identification result; and
an erasure sound signal generation circuitry which generates an erasure sound signal for erasing the noise from the user's listening sound signal acquired using one or more microphones and the adjustment information.
4 . The noise suppression device according to claim 3 , wherein
a value of the situation identification result is a binary value of a value indicating that the event occurs around the user and a value indicating that the event does not occur, and
the adjustment information is information indicating to exclude the event sound erasure sound from the erasure sound when the value of the situation identification result is a value indicating that the event occurs around the user.
5 . The noise suppression device according to claim 3 , wherein
a value of the situation identification result is a value indicating a degree of correlation between the noise and a reference sound for determining the sound originating from a predetermined event, and
the adjustment information is information indicating that the greater the value of the situation identification result, the greater the proportion of excluding the event sound erasure sound from the erasure sound.
6 . A noise suppression method, in which, when noise around a user includes a sound originating from a predetermined event (hereinafter referred to as “event sound”), the user is made aware that the event occurs.
7 . A non-transitory computer-readable storage medium which stores a program for causing a computer to function as the noise suppression device according to claim 1 .