Berkhoff
Arthur Perry Berkhoff, Doetinchem NL
Patent application number | Description | Published |
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20100150369 | FILTER APPARATUS FOR ACTIVELY REDUCING NOISE - A filter apparatus for reducing noise from a primary noise source, comprising a secondary source signal connector for generating secondary noise to reduce said primary noise and a sensor connector for connecting to a sensor for measuring said primary and secondary noise as an error signal. A first control filter is arranged to receive a reference signal and calculate a control signal for the secondary source signal. A second control filter is arranged to receive a delayed reference signal and calculate an auxiliary control signal; wherein an adaptation circuit is arranged to adapt said second control filter while receiving an error signal as a sum of the auxiliary control signal and an auxiliary noise signal. The auxiliary noise signal is constructed from a difference of the delayed filtered error signal and a delayed control signal. The first control filter is updated by a copy of said updated second control filter. | 06-17-2010 |
Marc Berkhoff, Ede NL
Patent application number | Description | Published |
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20080274659 | COMPLEX COMPRISING A DRYLAID VEIL OF GLASS FIBRES, AND A NONWOVEN FABRIC OF ORGANIC FIBRES - The invention concerns a process for preparing a complex sheet comprising a layer of drylaid glass fibres and a layer of organic fibres, comprising: | 11-06-2008 |
20100119795 | COMPLEX COMPRISING A DRYLAID VEIL OF GLASS FIBRES, AND A NONWOVEN FABRIC OF ORGANIC FIBRES - The invention concerns a process for preparing a complex sheet comprising a layer of drylaid glass fibres and a layer of organic fibres, comprising: | 05-13-2010 |
Wolfgang Berkhoff, Frankfurt Am Main DE
Patent application number | Description | Published |
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20090132024 | Vascular Prosthesis for Aneurysms, Set of Vascular Prostheses, Method for Manufacturing a Vascular Prosthesis and Method for Inserting a Vascular Prosthesis - The present invention relates to a vascular prosthesis for aneurysms ( | 05-21-2009 |