Abnormality detecting device, abnormality detection method, and abnormality detection computer program
AssigneeFujitsu Limited
InventorsYohei KISHI, Akira Kamano, Masanao SUZUKI
Life of this patent
Estimating the term…
Abstract
An abnormality detecting device includes a memory, and a processor coupled to the memory and configured to: detect an envelope of an audio signal indicating a periodic sound emitted by a target object and a periodic sound emitted by another object; execute time-to-frequency conversion on the envelope to calculate a frequency spectrum of the audio signal; and determine whether or not the target object has an abnormality, based on a frequency component included in the frequency spectrum and corresponding to a time interval between time points when the sound is emitted by the target object.
Claims7
An abnormality detecting device comprising:
- a memory;
- and
- a processor coupled to the memory and configured to:
- detect an envelope of an audio signal indicating a periodic sound emitted by a target object and a periodic sound emitted by another object;
- execute time-to-frequency conversion on the envelope to calculate a frequency spectrum of the audio signal;
- and
- determine whether or not the target object has an abnormality, based on a frequency component included in the frequency spectrum and corresponding to a time interval between time points when the sound is emitted by the target object.
An abnormality detection method, comprising:
- detecting an envelope of an audio signal indicating a periodic sound emitted by a target object and a periodic sound emitted by another object;
- executing time-to-frequency conversion on the envelope to calculate a frequency spectrum of the audio signal;
- and
- determining whether or not the target object has an abnormality, based on a frequency component included in the frequency spectrum and corresponding to a time interval between time points when the sound is emitted by the target object.
A non-transitory computer-readable recording medium storing a program for causing a computer to execute a process, the process comprising:
- detecting an envelope of an audio signal indicating a periodic sound emitted by a target object and a periodic sound emitted by another object;
- executing time-to-frequency conversion on the envelope to calculate a frequency spectrum of the audio signal;
- and
- determining whether or not the target object has an abnormality, based on a frequency component included in the frequency spectrum and corresponding to a time interval between time points when the sound is emitted by the target object.
Dependencies are inferred from the claim text.