NOISE CANCELLING APPARATUS, NOISE CANCELLING METHOD, AND PROGRAM
A noise suppression technique which operates stably even when a reference microphone or an error microphone picks up sound other than noise assumed to occur around a user is provided. A noise suppression device suppresses a noise suppression function for sounds other than noise expected to occur around the user.
1 . A noise suppression device, in which a noise suppression function for sounds other than noise expected to occur around a user (hereafter referred to as “unexpected sounds”) is suppressed.
2 . The noise suppression device according to claim 1 , comprising:
a situation identification result generation circuitry which, using at least one signal of a signal of noise around the user acquired using one or more microphones (hereinafter referred to as a “noise signal”) and a signal of the user's listening sound acquired using one or more microphones (hereinafter referred to as a “listening sound signal”), generates a situation identification result indicating whether an unexpected sound occurs for each of the signals;
a flag information generation circuitry which generates flag information indicating whether to generate a signal for erasure sound for erasing noise around the user (hereinafter referred to as an “erasure sound signal”) from the situation identification result; and
an erasure sound signal generation circuitry which, when the flag information indicates not to generate an erasure sound signal, does not generate the erasure sound signal and, in other cases, generates the erasure sound signal from the noise signal and the listening sound signal.
3 . The noise suppression device according to claim 2 , wherein
the flag information generation circuitry generates,
when there are two or more of the situation identification results, flag information indicating not to generate an erasure sound signal when at least one situation identification result indicates that an unexpected sound occurs.
4 . The noise suppression device according to claim 2 , wherein
the microphones are installed using a predetermined member so that a gap is formed between it and the ground plane.
5 . The noise suppression device according to claim 1 , comprising
an erasure sound signal generation circuitry which generates a signal for erasure sound for erasing noise around the user (hereinafter referred to as an “erasure sound signal”) from a signal of noise around the user acquired using one or more microphones (hereinafter referred to as a “noise signal”) and a signal of the user's listening sound acquired using one or more microphones (hereinafter referred to as a “listening sound signal”),
wherein the microphones are installed using a predetermined member so that a gap is formed between it and the ground plane.
6 . A noise suppression method, in which a noise suppression device suppresses a noise suppression function for sounds other than noise expected to occur around a user (hereinafter referred to as “unexpected sounds”).
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 .