Class / Patent application number | Description | Number of patent applications / Date published |
181196000 | Within tubular means | 12 |
20120097476 | DEVICE AND METHOD FOR REDUCING NOISE - The present invention relates to a device for the passive reduction of the sound vibrations in a liquid resulting from a sound source arranged below the liquid level of a body of water, the device comprising an elongate tube which can be arranged over the sound source, the tube comprising an outer wall and inner wall, wherein the tube is designed to maintain a certain desired pressure in the intermediate space between the inner and outer wall. In this case, the pressure is reduced with respect to the ambient pressure. As a result of the reduced pressure, the sound vibrations will less readily travel to the outside and the noise level in the area around the tube is reduced. | 04-26-2012 |
20120111660 | IMPLEMENTING DYNAMIC NOISE ELIMINATION WITH ACOUSTIC FRAME DESIGN - A method, system and computer program product are provided for implementing dynamic noise elimination. A system frame includes a plurality of acoustical sensory devices monitoring the system for problem frequencies. The system frame includes a plurality of tubes. When the tube is open, airflow is allowed. When identified tubes are closed, quarter-wavelength attenuation is provided for a frequency in a range of frequencies, based upon a length of the tube when closed. Each of the plurality of tubes is selectively controlled to be operable open or closed at a particular length, responsive to identified problem frequencies. | 05-10-2012 |
20120118664 | TUBULAR BODY SOUNDPROOF COVER AND COVERED TUBULAR BODY - A purpose is to provide a tubular body soundproof cover and a covered tubular body, for which elastic deformation of the tubular body is unlikely to be inhibited. The tubular body soundproof cover includes a sound absorbing layer arranged on outside in an axially perpendicular direction of a tubular body having tubular body side curved sections; a skin layer arranged on outside in the axially perpendicular direction of the sound absorbing layer; and cover side curved sections arranged on outside in the axially perpendicular direction of the tubular body side curved sections, including at least a portion of the sound absorbing layer and at least a portion of the skin layer. The cover side curved sections have non-adherent sections in which the sound absorbing layer and the skin layer are not bonded over the entire circumferential length. | 05-17-2012 |
20120247866 | Acoustic Noise Reducing - A structure for attenuating noise in an acoustic port or an acoustic waveguide. A tube shaped acoustic passage has an acoustically resistive section near the inlet end or the outlet end. The tube shaped acoustic passage may have an elongated opening covered by acoustically resistive material. | 10-04-2012 |
20130032431 | SYSTEM AND METHOD FOR DISSIPATION OF AN EFFECT OF A TUBE WAVE - A tube wave reduction system for a borehole includes a tubular member. One or more openings in the tubular member. A dissipater in fluid communication with the one or more openings. Also included is a method for reducing an effect of a tube wave. | 02-07-2013 |
20130327584 | SILENCER DEVICE FOR A FLUID LINE AND HEATING UNIT HAVING A SILENCER DEVICE - The present invention relates to a silencer device for a fluid line which comprises a resonator arrangement which comprises a first resonator tube comprising a first resonator chamber designed for a λ/4 damping of at least one sound wavelength, wherein the first resonator tube comprises a first longitudinal direction, two end walls facing each other in the first longitudinal direction and a first side wall extending between the end walls, and wherein the first resonator chamber is formed between the first side wall and the end walls of the first resonator tube. The resonator arrangement further comprises a second resonator tube comprising a second resonator chamber designed for a λ/4 damping of at least one sound wavelength, wherein the second resonator tube comprises a second longitudinal direction, two end walls facing each other in the second longitudinal direction and a second side wall extending between the end walls, and wherein the second resonator chamber is formed between the second side wall and the end walls of the second resonator tube. The invention further relates to a heating device comprising such a silencer device. | 12-12-2013 |
20140299402 | VECTORIZED JET FAN - A vectorized jet fan device for ventilation which is capable of directing high speed air stream discharged from the fan by a small angle at a higher flow speed for the primary purposes of efficiently meeting and utilizing space clearance and improving aerodynamic performance. The inventive device includes a splitter, through which an end silencer and a silencer is securely connected to the end of a fan. The splitter is formed so that the end silencer of a smaller diameter than the silencer can be fittingly engaged at a small degree of angle from the longitudinal axis of the fan. | 10-09-2014 |
20150129352 | SOUND REDUCTION SYSTEM - The disclosure relates to a sound reduction system comprising a sound reduction device. The sound reduction device comprises a sound reducing material. The system further comprises a channel wherein a gaseous medium is arranged to flow. The sound reduction device is mounted inside the channel, thereby placing the sound reducing material inside the channel. | 05-14-2015 |
20160119711 | WAVEGUIDE FOR SHAPING SOUND WAVES - An acoustic waveguide includes a plurality of projections to redirect sound waves to obtain a desired wave front, such as a flat plane wave front or an asymmetric curved wave front. The waveguide includes two waveguide members that are mirror images of each other. The waveguide members have corresponding vanes and projections. The waveguide includes an essentially circular input opening for alignment with a compression driver and provides a substantially rectangular output opening from the waveguide. | 04-28-2016 |
181197000 | Adjustable | 3 |
20100163334 | SOUND MAXIMIZING AMMELLESCOPE - In this device, three chambers, three chips with multiple holes and three membranes senses and magnifies sound signal from miles away to a magnitude that can be heard by device holder. Sound wave enter from the membrane, vibration energy is transmitted by highly compressed air within chamber | 07-01-2010 |
20140060961 | Variable Frequency Helmholtz Resonator - A variable frequency Helmholtz resonant cavity includes a Helmholtz resonant cavity body, two Helmholtz resonant cavity pipes with different cross-sectional areas and lengths and a control valve plate. The Helmholtz resonant cavity body is connected with the main pipe of the intake system via the Helmholtz resonant cavity pipes, and the control valve plate is disposed at the location where the two Helmholtz resonant cavity pipes meet. | 03-06-2014 |
20160160718 | Triple baffled muffler - A triple-baffled muffler enables an engine sound that changes from very quiet when idling to louder as the throttle is pressed. The muffler provides three baffles which are hinged over the center of the muffler. The exhaust pressure travels through the muffler and pushes the baffles until they open to release the pressure. The angle of incidence of the baffles on their hinges governs the loudness of the sound. | 06-09-2016 |