Matches 1 - 25 out of 25


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US20090255754 ACTIVE MUFFLER  
The present invention to an active muffler for an exhaust gas system of an internal combustion engine, in particular in a motor vehicle, includes a multi-shell housing having a pot-shaped top...
US20130129036 ARRANGEMENT AND METHOD FOR THE ACTIVE VIBRATION DAMPENING OF AN X-RAY EMITTER FROM OUTSIDE OF THE X-RAY EMITTER  
An arrangement for the active vibration compensation of an x-ray emitter includes a counteracting vibration generation unit arranged outside of the x-ray emitter for reducing a vibration produced...
US20060236973 ACTIVE INTAKE MUFFLER  
An active intake muffler for an air intake duct of an internal combustion engine includes a control unit, a sensor assembly operatively connected to the control unit, and a diaphragm constructed...
US20080196967 Active Countersound System with Special Arrangement of the Secondary Actuators for Reducing the Passage of Sound at an Open Boundary Area of Two Volumes; Active Countersound Arrangement; Method for Actively Reducing Sound  
An active countersound system for actively reducing the sound waves of primary sound waves, with a regulator unit, an error sensor, a reference sensor and several secondary actuators. The...
US20120097477 STANDING WAVE ATTENUATION DEVICE  
A standing wave attenuation device is installed in a cabin of a vehicle so as to reduce a standing wave caused by external noise such as road noise. The standing wave attenuation device provides a...
US20090057054 SOUND GENERATOR WITH STRUCTURALLY AND ACOUSTICALLY COUPLED SOUND RADIATION PANEL AND METHOD FOR MANUFACTURING THE SAME  
A sound generator for a vehicle is provided, including a hollow drum having a sound radiation panel structurally and acoustically coupled thereto. The drum has an aperture formed in an outer wall...
US20080236938 INDUCTION SYSTEM DUCT WITH NOISE ATTENUATING HOLES  
A duct for an induction system is provided that has an effective length between an inlet and outlet. An aperture is provided a wall of the duct at a location corresponding to a pipe resonance for...
US20070062756 Active exhaust-noise attenuation muffler  
An active exhaust-noise attenuation muffler for an exhaust pipe includes a control unit, a sensor assembly which is operatively connected to the control unit, and a gas-tight diaphragm constructed...
US20060260866 NOISE-REDUCED VACUUM APPLIANCE  
A vacuum appliance includes a motor having a rotatable shaft. An air flow generating member is connected to the shaft. The air flow generated by the rotating member generates noise having a...
US20080078611 ELECTRONIC APPARATUS AND SOUND INSULATING METHOD THEREOF  
An electronic apparatus includes a drive for recording/reproducing a recording medium, and a sound absorbing member having a Helmholtz resonator for insulating sounds at a predetermined frequency...
US20080298967 Wind turbine blade with anti-noise devices  
A wind turbine comprising at least a blade (11) having an aerodynamic profile with a leading edge (13), a trailing edge (15) and suction and pressure sides between the leading edge (13) and the...
US20070125592 Excitation of air directing valves and air handling surfaces in the cancellation of air handling system noise  
A piezoelectric vibrator generates attenuating waves in an air duct in an automobile HVAC system to cancel or reduce the noise created by sound waves. A processor converts a sinusoidal noise...
US20100252358 Airflow Optimization and Noise Reduction in Computer Systems  
In one embodiment, a fan is used to generate airflow through a computer chassis to a fan air inlet. An audible frequency component of the airflow is identified and selected. A sound wave is...
US20150159527 SOUND GENERATOR FOR A SYSTEM FOR INFLUENCING EXHAUST NOISE OF A MOTOR VEHICLE  
A sound generator, for a system for influencing sound waves propagating through an exhaust system of a vehicle driven by an internal combustion engine, includes an enclosure comprised of an upper...
US20100252677 AEROPLANE WITH IMPROVED ACOUSTIC COMFORT  
An aircraft includes a cabin in which at least part of the space is demarcated by trim panels and the cabin is provided with a system for the active control of ambient noise. Each trim panel is...
US20080142294 Noise control system using smart materials  
A noise control system operable within a box-like structure provided by the dual bulkhead plenum of the vehicle dashboard positioned within the transfer path along which the noise is being...
US20090008185 Double-glazed windows wth inherent noise attenuation  
The present invention relates to a noise attenuating window comprised of two panes of glass separated by a spacer tube. The spacer tube contains T-shaped acoustic resonator capable of targeting a...
US20090205903 METHOD AND SYSTEM FOR ACTIVELY INFLUENCING NOISE, AND USE THEREOF IN A MOTOR VEHICLE  
Method for influencing noise, wherein a noise source (16), in particular an engine in a motor vehicle, generates the noise with a substantially periodically variable excitation, and wherein a...
US20090180635 METHOD AND APPARATUS FOR ATTENUATING FAN NOISE THROUGH TURBULENCE MITIGATION  
Some embodiments of the present invention provide a system that attenuates noise from a fan exhaust of a computer system. During operation, the system monitors the noise from the fan exhaust and...
US20050167190 Noise management system for reducing airborne and structure borne noise of a vehicle exhaust system  
In an active noise cancellation system having exhaust noise and anti-noise initiating at sources positioned perpendicular to each other, a noise management arrangement having a noise cancellation...
US20090236173 METHOD FOR REDUCING NOISE IN A VEHICLE CABIN  
A method of controlling noise from a six cylinder engine that can selectively use in separate operating modes either three cylinders, four cylinders, or all six cylinders, is provided that uses a...
US20080135328 Noise reduction device  
A plurality of openings are provided on the surface of a body casing which comprises a noise reduction chamber, and plate members (a reflecting plate and a sound waves introduction plate) are...
US20090260916 DEVICE AND METHOD FOR ACTIVE NOISE CANCELLATION IN AN EXHAUST GAS CHANNEL OF A COMBUSTION ENGINE  
The invention relates to an active noise cancellation device. The invention proposes a device and a method used to cancel the noise in an exhaust gas channel of a vehicle A noise signal is...
US20080236937 RESONATOR WITH INTERNAL SUPPLEMENTAL NOISE ATTENUATION DEVICE  
A resonator for an induction system includes an inlet and outlet with a resonator cavity arranged therebetween. A tube is arranged within the resonator cavity and at least partially extends...
US20160288738 WHEEL RESONATOR FOR VEHICLE  
A wheel resonator for a vehicle may include a resonant plate which has an annular structure that is wound around a rim portion of a wheel while maintaining predetermined tension, has resonant...

Matches 1 - 25 out of 25