Telecoil hum filter
US10476609B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2017 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | Nov 21, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2225/51
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and/or method is provided for enhanced listening of audio signals acquired via a telecoil by performing hum filtering. The system may include a telecoil and a telecoil hum filter. The telecoil hum filter may include a comb notch filter. The comb notch filter may include a delay module and a comb notch filter summing module. The telecoil may be operable to receive a magnetic signal and convert the magnetic signal to an input audio signal. The delay module of the comb notch filter may be configured to generate a delayed signal by applying a delay to the input audio signal. The delay may be based on a fundamental hum frequency. The comb notch filter summing module may be configured to generate a comb notch filter output signal by adding the input audio signal and the delay signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.