| Patent application number | Description | Published |
|---|
| 20080224863 | Method for Monitoring a Room and an Apparatus For Carrying Out the Method - A method for monitoring a room (R) is specified, in which acoustic properties ({circle around (S)}, W) of the room (R) are determined, changes (δ) in the acoustic properties ({circle around (S)}, W) of the room (R) are detected, the changes (δ) are compared with prescribed criteria (Δ{circle around (S)}, ΔW)and an action (α) is triggered if the prescribed criteria (Δ{circle around (S)}, ΔW) have been satisfied. This makes it possible to monitor a room with the aid of an active noise reduction system. If there is no need to monitor a room, the system can be used for active noise reduction. | 09-18-2008 |
| 20080285767 | Method for the Estimation of a Useful Signal with the Aid of an Adaptive Process - Disclosed is an active noise detection system which is used in a room and utilizes at least one sensor unit for detecting the residual cumulative signal (e+g), one of the sensor units being used for detecting a useful signal (g). In order to make said useful signal (g) available at an improved quality, an additional adaptive process unit ( | 11-20-2008 |
| 20080317256 | Method for Reproducing a Secondary Path in an Active Noise Reduction System - A method for reproducing a secondary path in an active noise reduction system comprising a transmission path (S, | 12-25-2008 |
| 20090052690 | Method for Stabilizing an Adaptive Algorithm and Device for Carring Out Said Method - A method of estimating an unknown transfer function (H) which comprises an input signal (x) and an actual output signal (y), wherein an estimated output signal (ŷ) is generated in an adaptive process ( | 02-26-2009 |
| 20090070397 | METHOD FOR ACTIVE NOISE REDUCTION AND AN APPARATUS FOR CARRYING OUT THE METHOD - In active noise reduction, at least one input signal ( | 03-12-2009 |
| 20090220101 | Method for the Active Reduction of Noise, and Device for Carrying Out Said Method - Disclosed in a method in which a digital system is used for actively reducing noise. According to the method, a digital user signal can be transmitted at a different sampling rate, the sampling rate being adjusted with the aid of adequate converters. | 09-03-2009 |
