Audio samples to detect device anomalies

A non-transitory computer-readable storage medium comprising instructions when executed cause a processor of a computing device to:

• generate a matrix of audio information for a plurality of audio samples of a device collected at a time when the device is operating within a set of specifications, wherein the matrix includes a first portion that includes original audio samples and a second portion appended under the first portion that includes augmented audio samples;
• generate a plurality of principal components for each of the plurality of audio samples of the matrix utilizing a principal component analysis;
• select a principal component from the plurality of principal components based on a quantity of variance within each of the plurality of principal components;
• and
• input the selected principal component into a detection model to determine when a real time audio sample of the device exceeds a threshold defined by the detection model.

A system comprising:

• a sound recording device to capture a plurality of original audio samples of a printing device while the printing device is operating within manufacturer specifications;
• a computing device comprising a processor and a memory storing instructions executable by the processor to:
• augment the original audio samples to generate a plurality of augmented audio samples simulating to increase a quantity of variance among a plurality of audio samples including the original audio samples and the augmented audio samples;
• generate a first matrix of the original audio samples of the printing device by extracting features from each original audio sample, wherein the first matrix has a plurality of rows corresponding to the original audio samples and a plurality of columns corresponding to the extracted features;
• generate a second matrix of the augmented audio samples of the printing device by extracting the features from each augmented audio sample, wherein the second matrix has a plurality of rows corresponding to the augmented audio samples and a plurality of columns corresponding to the extracted features, the columns of the second matrix respectively corresponding to the columns of the first matrix;
• append the second matrix to a bottom of the first matrix to generate a third matrix having a plurality of rows including the rows of the first matrix and the rows of the second matrix and having a plurality of columns respectively corresponding to the columns of the first matrix;
• generate a plurality of principal components for the third matrix utilizing a principal component analysis, by performing the principal component analysis for each row of the third matrix;
• and
• select the principal component having a greatest quantity of variance;
• and
• an anomalous detection device to:
• receive the selected principal component;
• and
• utilize the selected principal component to determine when a real time audio sample exceeds a threshold.