Active noise cancellation system for headphone
US10609468B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2017 |
| Grant date | Mar 31, 2020 |
| Priority date | — |
| Expiry date | Sep 14, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2410/05
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An active noise cancellation system comprising an active noise cancellation circuit connected to a microphone arranged to sense environmental noise, the active noise cancellation circuit comprising: —an analog-to-digital converter (ADC) arranged to convert the sensed environmental noise to a digital environmental noise signal, —a prediction filter configured for predicting a plurality D of inverted digital environmental noise samples and generating a digital inverted environmental noise signal, —a digital-to-analog converter (DAC) to convert the digital inverted environmental noise signal to an analog inverted environmental noise signal for cancelling the environmental noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.