Active noise cancellation system
US10186249B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 2017 |
| Grant date | Jan 22, 2019 |
| Priority date | — |
| Expiry date | Nov 13, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3051
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An active noise cancellation system for canceling noises within a predetermined bandwidth includes an analog-to-digital converter, a programmable noise-cancellation module, a first interpolation filter and a digital-to-analog converter. The analog-to-digital converter receives a first audio signal, and converts the first audio signal from an analog signal to a digital signal. The programmable noise-cancellation processes the first audio signal to generate a noise cancellation signal. The first interpolation filter receives a second audio signal and filters the second audio signal. The noise cancellation signal and the filtered second audio signal are integrated by an adder as a third audio signal, and then the digital-to-analog converter converts the third audio signal from a digital signal to an analog signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.