Patent ID: 11894011
Assignee: THE NIELSEN COMPANY (US), LLC
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 16:
17. A method to reduce noise from harmonic noise sources, wherein the method comprises:
determining a first amplitude value in a frequency spectrum of an audio sample;
determining one or more points in the frequency spectrum having at least one of (a) a second amplitude value within an amplitude threshold of the first amplitude value, (b) a frequency value within a frequency threshold of the first amplitude value, or (c) a phase value within a phase threshold of the first amplitude value;
generating a contour trace, wherein the contour trace includes at least one of the determined first amplitude value and the determined one or more points; and
based on the contour trace, modifying the audio sample; and
determining if the contour trace is an outlier based on a distance from a parameter of the contour trace.