System and method for actively influencing sound
US10002603B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 2017 |
| Grant date | Jun 19, 2018 |
| Priority date | — |
| Expiry date | Apr 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3026
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A system has a sound generator (20) that generates superimposed sound to a sound to be manipulated. An error sensor (50) measures sound and outputs a corresponding feedback signal (e′(n)). A signal generator (91) generates a sound signal (y(n)). A controller (92) generates a control signals (λ1(n)) and (λ2(n)). The adder (94) subtracts one control signal (λ2(n)) from the feedback signal (e′(n)) and outputs a modified feedback signal (en(n)) to the signal generator (91). A weighter (95) weights the sound signal (y(n)) with the control signal (λ1(n)) and outputs the weighted sound signal (y′(n)). The generated sound signal (y(n)) is a function of the modified feedback signal (e(n)). The controller (92) generates the control signals (λ1(n), λ2(n)) such that a value of the amplitudes of the feedback signal (∥e′(n)∥) corresponds to a predefinable value (Δ).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.