Reducing audibility of sensor noise floor in a road noise cancellation system
US10593317B1 · kind B1 · utility
3Cited by
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20Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 20, 2018 |
| Grant date | Mar 17, 2020 |
| Priority date | — |
| Expiry date | Dec 20, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3044
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A road noise cancellation (RNC) system may include a controller and attenuator for reducing the audibility of the noise floor caused by the system's vibration sensors. A level of anti-noise at a location in a passenger cabin that may be attributed to the sensor noise floor may be estimated. An actual sound level in the passenger cabin may be measured or estimated, with the sensor noise floor component algorithmically removed. The difference in levels may be compared to a predetermined threshold to determine an amount of attenuation, if any, to be applied to an anti-noise signal to reduce audibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.