Patent ID: 11971694
Assignee: NEC CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 5:
6. An abnormal-sound detection method comprising:
capturing a video of a diagnosis object by a camera;
extracting a feature point of the diagnosis object from the video of the diagnosis object captured by the camera;
identifying an operation range of the diagnosis object, based on a movement range of the extracted feature point;
collecting sounds arriving from the diagnosis object by a microphone;
sensing a sound in which an abnormality has occurred from among the sounds collected by the microphone;
identifying, based on the collected sound, a generation position of the sound in which the abnormality is sensed; and
determining, based on the operation range and the identified generation position, whether the sound in which the abnormality is sensed is derived from the diagnosis object or derived from another element.