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US20120018246 Muffler Unit for Fume Extractor Hood  
A muffler unit (4) for fume extractor hood is disclosed, which comprises an active noise suppression system, comprising at least one loudspeaker (6), and at least two microphones (M1, M2)...
US20150230675 EXHAUST GRILLE  
The present invention relates to an exhaust grille (10, 20, 30, 40). The exhaust grille comprises an array comprising an array of spaced vanes (15) which define a plurality of separate non-linear...
US20110155503 SYSTEMS AND METHODS FOR PROVIDING AIRFLOW  
An exemplary embodiment of the present invention provides a silencer. The silencer includes an enclosure with a first airflow path configured to allow air to pass through the enclosure and...
US20150101883 SOUND ATTENUATION MODULE AND OVERSIZED GRILL  
A Sound Attenuation Module and Oversized Grill is disclosed which prevents noise generated by an HVAC system from traveling through the duct system and into the room to which the air is directed....
US20150241084 DIFFUSER AND AIR CONDITIONER HAVING THE SAME  
A diffuser capable of reducing noise generated due to a flow of cool air when the cool air is discharged from a supply duct configured to supply cool air generated from a body provided at outdoors...
US20120125709 VANE TYPE SILENCERS IN ELBOW FOR GAS TURBINE  
A silencer for a gas turbine includes a first duct portion; a second duct portion connected to the first duct portion, the first and second duct portions forming an elbow region at the connection;...
US20110168482 VANE TYPE SILENCERS IN ELBOW FOR GAS TURBINE  
A silencer for a gas turbine includes a first duct portion; a second duct portion connected to the first duct portion, the first and second duct portions forming an elbow region at the connection;...
US20140072157 MAGNETIC CONNECTOR  
Acoustic duct connector for an acoustic duct of the type being used for real ear measurements, the acoustic duct connector comprising a first surface portion and a first acoustic duct exiting from...
US20150053498 SILENCER FOR A VEHICLE AIR CONDITIONING SYSTEM  
A silencer for a vehicle air conditioning system is designed to reduce a noise and a vibration of a compressor transmitted into a vehicle room along coolant pipes. The silencer includes a silencer...
US20110200426 NOISE REDUCTION DEVICES FOR BLOWERS  
A noise reduction device for a blower includes a noise reduction member. The noise reduction member has a noise reduction chamber and a noise reduction opening defined therein, so that a part of...
US20120273298 SILENCERS FOR AIR CONDITIONING SYSTEMS  
Silencers for air conditioning systems are provided. In an exemplary embodiment, the silencer comprises a cylindrical silencer wall having a flow axis, a first channel disposed within the...
US20150176860 LOW NOISE AIR CIRCULATION DEVICE  
An air warmer has a housing whereinto is positioned a noise reduction mechanism having a casing that encases a sound reducing structure having a maze like cavity. An axial fan is positioned within...
US20130052930 SOUND DEADENING BAFFLE FOR A VENTILATION VALVE  
A baffle (10) for a venting valve for reducing the admission of sound into the interior in particular of a motor vehicle, including at least one air guiding channel (16, 18, 20, 22) having a...
US20110061968 Sound Attenuator for Low Frequencies, Method for Manufacturing Sound Attenuator for Low Frequencies and System for Attenuating Low Frequencies for Example In Air-Conditioning Ducts of Paper Mills  
A sound attenuator for low frequencies in an air-conditioning duct of paper mills includes a sound attenuator frame insertable in the air-conditioning duct. At least one attenuator member...
US20140339013 DUCT  
A duct of a foamed blow-molded article that is constituted of a polyolefin-based resin with a bending elastic modulus of 800-1,300 MPa, that has an average apparent density (D) of 0.1 to 0.4 g/cm3...
US20050092544 Fan unit air flow control  
A fan unit comprises a top having an inlet opening, at least one side for enclosing the fan unit, and an outlet opening. A fan blower is disposed on a blower mounting, the fan blower being for...
US20090166126 Sound-damping air-conducting duct and method for the production of a sound-damping air-conducting duct  
A sound-damping air-conducting duct that has at least one exit opening for air, and is provided, in the region of the exit opening, with a lining made of a sound-absorbing material, which lining...
US20090200103 SONIC ABSORPTION DEVICE FOR AN AIR PIPELINE OF AN AIRCRAFT, IN PARTICULAR OF AN AIR CONDITIONING SYSTEM OF AN AIRCRAFT  
A sonic absorption device for an air pipeline of an aircraft, which sonic absorption device comprises at least one curved pipe section whose respective interior wall is clad with a sound...
US20090020358 Air treatment and sound reduction system  
A device for reducing sound from an air treatment unit includes, in one embodiment, an air treatment system, including a wall mount HVAC unit with a supply air opening and a return air opening. A...
US20130213733 SILENCER AND ROTATING MACHINE EQUIPPED THEREWITH  
In a silencer, holes are disposed in one row with intervals to each other along one direction, holes forming the one row are disposed in a plurality of rows in a direction perpendicular to the one...
US20050201567 Tunable exhaust system  
An exhaust system includes an exhaust conduit; a piezoelectric patch secured to the exhaust conduit; a sensor in operative communication with the exhaust conduit; and a controller in operative...
US20140209408 EXHAUST CONE  
A gas turbine engine exhaust cone (40) comprising one or more acoustic absorption chambers (48), each chamber (48) comprising two side walls (50) and an acoustic attenuation wall (62). The side...
US20110127106 ASPIRATOR WITH INTEGRAL MUFFLER  
An aspirator with an integral muffler includes a housing having a top, a bottom and a side and an aspirator chamber and a muffler chamber in the housing. The aspirator chamber includes an inlet,...
US20120217088 SOUND ATTENUATING AIR VENT  
A sound attenuating air vent comprises: an air path and a discontinuous sound absorbing lining around at least a part of the air path. A method of designing such a sound attenuating air vent...
US20100044149 Acoustic Management Of Fluid Flow Within A Duct  
Apparatus and methods described herein provide for the management of noise associated with a duct. A sound-dampening apparatus is provided consisting of a duct through which a fluid flows, such as...
US20050161280 Silencer and electronic equipment  
A silencer is disclosed that includes a housing having a flat enclosing shape and having formed therein a passage for silencing; and pores, being formed at the housing so as to be communicatively...
US20120006615 HIGH PRESSURE DROP MUFFLING SYSTEM  
A system for venting a high-pressure flow stream is disclosed, the system comprising a device having a plurality of orifice plates, each orifice plate having a plurality of orifices, wherein the...
US20080223652 Single Duct Silencing Terminal Unit  
An apparatus and method for attenuating the sound generated by a single duct terminal unit in an HVAC (heating, ventilating, and air conditioning) system. The apparatus utilizes internal geometry...
US20100307862 SOUND ABSORBING SYSTEM FOR ELECTRONIC DEVICE  
Disclosed herein is a sound absorbing system used for an electronic device that has enhanced noise reduction capabilities, while maintaining the cooling performance of the device and without...
US20090133957 Sound attenuating air vent  
An device that allows air flow while attenuating sound for the purposes of allowing air to flow between rooms in a structure such as a house or building. The device consists of an air passageway...
US20090318072 Blast Protection Damper  
A blast wave damper comprises a section of duct (14), with a multiplicity of rigid elements (18) each extending across the duct. All the elements are parallel to each other, and they are arranged...
US20080236939 Exhaust silencer assembly  
An exhaust silencer assembly for use with a gas turbine engine, the exhaust silencer assembly comprising an exhaust duct extension disposed downstream from an exhaust diffuser of the gas turbine...
US20080233856 Air conditioner duct  
An air conditioner duct connected to a downstream side of an air flow path of a vehicular air conditioning apparatus is provided with an outer pipe portion and an inner pipe portion formed at an...
US20080230305 Sound absorbing structure of electronic equipment  
In order to provide sound absorbing structure capable of reducing the noise of electronic equipment while maintaining the cooling capability of the electronic equipment, there is provided sound...
US20100077755 SOUND ATTENUATION SYSTEMS AND METHODS  
Methods and devices for increasing the sound attenuation properties of a noise suppression device are provided. In some embodiments, a sound attenuating conduit has an improved shape that provides...
US20120211300 SYSTEM METHOD AND DEVICES FOR WINDAGE NOISE DAMPING IN INDUCTION MOTOR  
A rotor windage noise damping system for an induction motor cooling vent. A duct having a duct airflow path has a proximal end opening in communication with the cooling vent, and the distal end...
US20100006368 Localized Decisions and Actions Determined from Communal Network of Observations in Order to Achieve Global Solution  
A method is provided for making localized decisions and taking localized actions to achieve a global solution. In an embodiment of the present invention, acoustic impedances for impedance-tunable...
US20120024623 NOISE ATTENUATOR AND VEHICLE AIR INTAKE DUCT PROVIDED THEREWITH  
A noise attenuator which can reduce time and cost for installation thereof as compared with the conventional configuration and a vehicle air intake duct provided with the noise attenuator are...
US20110308883 ACOUSTIC NOISE CONTROL IN HEATING OR COOLING SYSTEMS  
A heating or cooling system comprising a powered fan held in a duct assembly. The powered fan generates acoustic noise when blowing air. The system also comprises an acoustic wave modulator held...
US20110259666 SOUND ATTENUATION CANOPY  
A sound attenuation canopy for reducing levels of sound passing through an opening comprises a sound absorbing member. The sound absorbing member is comprised of a flexible sound absorbing...
US20080271945 Fan Powered Silencing Terminal Unit  
An apparatus and method for attenuating the sound generated by a fan powered terminal unit in an HVAC (heating, ventilating, and air conditioning) system. The apparatus utilizes internal geometry...
US20100078258 SILENCING EQUIPMENT FOR ELECTRIC DEVICES  
Silencing equipment provided with one or more flow channels through which cooling air flows has a flow channel forming member that forms the flow channel, and an acoustic absorbent member that is...
US20060272886 SILENCER  
In a silencer (1) for a flow passage (2) of a turbomachine, in particular of a power plant, a plurality of walls (2) are arranged in the flow passage (3), extend parallel to a gas flow (4)...
US20110079462 MUFFLING DEVICE  
A muffling device has a muffling piece that is placed in an airflow path and muffles sound caused by airflow, and a drive unit that performs one of rotation and movement of the muffling piece.
US20130058802 LOW ICE PNEUMATIC MOTOR EXHAUST MUFFLER  
A muffler for a positive displacement pneumatic motor includes a case, an inlet, a diffuser, a pathway, and sound absorbing material. The inlet and the diffuser are attached to the case. The...
US20090011696 VENTILATION DEVICE AND FRAME SYSTEM  
A ventilation device comprises a body (11) having first and second ports (14, 15) and a ventilation passage (13) that extends through the body between the ports to allow airflow through the body....
US20130118830 SOUND-ABSORPTIVE PANEL FOR AN AIR HANDLING SYSTEM  
An assembly is configured to provide insulation and sound-dampening within an air-handling system. The assembly includes a single housing defining an internal chamber, at least one...
US20120090915 AIR DUCT ATTENUATOR  
An attenuator for the air inlet tract of an internal combustion engine comprises an unobstructed tube (4) having a surrounding enclosure (9) divided into a primary chamber (11) in fluid...
US20120270493 Packless Silencer for a Venturi Control Valve  
A packless silencer for a Venturi control valve being a generally rectangular enclosed housing formed by four side walls and having an intake opening and a discharge opening. Four perforated...
US20110088966 SILENCER APPARATUS WITH DISPOSABLE SILENCER CARTRIDGE UNIT  
A silencer apparatus for attenuating noise in gas flow systems. The apparatus generally includes a housing having an interior cavity and a gas flow inlet and outlet that are adapted to be...
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