Nederlandse Organisatie Voor Toegepast-natuurwetenschappelijk Onderzoek Tno

Axign B.v.

Noviosound B.v.

Arthur Perry Berkhoff

Arno Willem Frederik Volker

Gerwin Hermanus Gelinck

Paul Louis Maria Joseph Van Neer

Antonius Maria Bernardus Van Mol

Hylke Broer Akkerman

Nicolaas Jan Doelman

Albert Jos Jan Marie Van Breemen

Arnoldus Johannes Maria Baltussen

Reinier Van 't Hooft

Gerard Nijsse

Jeroen Langevoort

David George Bradford

Michiel Wilbert Rombout Maria Van Overbeek

A device () and method for adhering by suction to a target surface (). The device has a substrate () with a contact surface () for contacting the device () to the target surface (). A plurality of pocket () are formed by respective pocket surfaces () concavely extending into the contact surface (). The pockets () have an open side () facing and being closed off by the target surface (). A flexible membrane () forms at least part of the pocket surface (). An actuator () is configured to actuate the flexible membrane (). A one-way valve () through the pocket surface () is configured to direct a contents of the pocket () via the one-way valve () to an environment ().

Configurable adhesive device and method

The present invention is in the field of an intra ear canal hearing aid, a pair of said hearing aids and use of said hearing aids. Such a hearing aid is designed to improve or support hearing. It typically relates to an electroacoustic device that is capable of transforming sound, thereby reducing noise and typically amplifying certain parts of the audio frequency spectrum. In addition such as hearing aid may improve directional perception of sound.

Intra ear canal hearing aid

A sound generator, particularly a loudspeaker, configured to emit sound, comprising a rigid element () enclosing a plurality of air compartments (), wherein the rigid element () has a back side (B) comprising apertures (), and a front side (F) that is closed, wherein the generator is provided with at least one actuator (), for instance one or more electromagnetic actuators and/or piezoelectric elements, configured to actuate the rigid element () for the generation of the sound.

Sound generator

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.

Filter apparatus for actively reducing noise

A device for actively reducing sound transmission, provided with a first and second wall () enclosing an inner space (), wherein at least the second wall () is provided with actuators (), for instance eletromagnetic actuators and/or piezoeleteric elements, wherein the said inner space is provided with at least one inner wall () to divide this space into at least two layers of air (), which inner wall () is arranged such that the layers of air () are in fluid connection with each other.

Device for actively reducing sound transmission, and panel comprising such device

Noise reduction arrangement including: a plurality of actuators (()) for generating secondary noise (p) to reduce primary noise (p) and being located in a first surface; a plurality of errors sensors (()) located in a second surface parallel to the first surface for sensing a total amount of noise resulting from the primary noise after being reduced by the secondary noise; a plurality of control elements (()) for controlling the actuators (()) based on the sensor outputs, wherein the distance (d) between the first and second surfaces is such that reduction in power RP of the total amount of noise relative to the primary noise within a predetermined frequency band is within the following range: 0.9&#xd7;RP&#x2266;RP&#x2266;RPin which RPis the maximum obtainable reduction in power of the total amount of noise relative to the primary noise, both RP and RPbeing expressed in decibel.

Growing community of inventors

Doetinchem, Netherlands

Arthur Perry Berkhoff