| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 181212000 |
Muffler, fluid conducting type
| 353 |
| 181284000 |
Sound absorbing panels
| 230 |
| 181198000 |
Housing or enclosure (e.g., sound confining and absorbing)
| 69 |
| 181207000 |
Mechanical vibration attenuator
| 29 |
| 181206000 |
By wave interference
| 13 |
| 181177000 |
Intensifying horn
| 12 |
| 181211000 |
Combined
| 11 |
| 181210000 |
Sound absorbing fence or screen (e.g., jet engine or vehicle noise)
| 9 |
| 181296000 |
Methods
| 7 |
| 181196000 |
Within tubular means
| 6 |
| 181176000 |
Lens | 4 |
| 20080264716 | Acoustic Device With Variable Focal Length - A device comprises an acoustic lens ( | 10-30-2008 |
| 20110168480 | PHASE PLUG AND ACOUSTIC LENS FOR DIRECT RADIATING LOUDSPEAKER - A phase plugs or acoustic lens improves the directional audio performance of a loudspeaker. Application of the improved directional audio performance to a sound system in a listening area may improve the performance of the audio system. Configuration of the acoustic lens or phase plug may include both symmetrical and asymmetrical features to provide an improved frequency response and directivity. The improved loudspeaker may provide improved an improved listing location, for example, in a vehicle. | 07-14-2011 |
| 20120000726 | SOLID-STATE ACOUSTIC METAMATERIAL AND METHOD OF USING SAME TO FOCUS SOUND - A phonemic crystal is made of a first solid medium having a first density and a substantially periodic array of structures disposed in the first medium, the structures being made of a second solid medium having a second density different from the first density. The first medium has a speed of propagation of longitudinal sound waves and a speed of propagation of transverse sound waves, the speed of propagation of longitudinal sound waves being approximately that of a fluid, and the speed of the propagation of transverse sound waves being smaller than the speed of propagation of longitudinal sound waves. | 01-05-2012 |
| 20120279797 | PHASE PLUG AND ACOUSTIC LENS FOR DIRECT RADIATING LOUDSPEAKER - A phase plugs or acoustic lens improves the directional audio performance of a loudspeaker. Application of the improved directional audio performance to a sound system in a listening area may improve the performance of the audio system. Configuration of the acoustic lens or phase plug may include both symmetrical and asymmetrical features to provide an improved frequency response and directivity. The improved loudspeaker may provide improved an improved listing location, for example, in a vehicle. | 11-08-2012 |
| 181295000 |
Space absorbers | 2 |
| 20110056763 | ACOUSTIC RESONANCE DEVICE - An acoustic resonance device is installed in a compartment of a vehicle so as to reduce a low-frequency sound pressure (or noise) dependent upon a natural vibration. Specifically, an acoustic resonance device is a panel/diaphragm resonator, a resonance pipe, or a Helmholtz resonator, the inner space of which communicates with the compartment via an opening. The acoustic resonance device is positioned in proximity to an antinode of sound pressure owing to a natural vibration occurring in a driver/passenger space inside the compartment. Alternatively, the acoustic resonance device increases a particle velocity at a specific natural frequency or decreases sound pressure at an excitation frequency which occurs due to an external condition of the vehicle. The acoustic resonance device can be installed in a roof, a seat, a pillar supporting the roof, or a door of a vehicle. | 03-10-2011 |
| 20120152650 | ATTENUATORS, ARRANGEMENTS OF ATTENUATORS, ACOUSTIC BARRIERS AND METHODS FOR CONSTRUCTING ACOUSTIC BARRIERS - An attenuator for attenuating acoustic waves, the attenuator comprising: a first body defining a cavity therein and an elongate open aperture extending across a substantial portion of the first body, the first body being configured to attenuate acoustic waves over a resonant frequency band. | 06-21-2012 |
| Entries |
| Document | Title | Date |
|---|
| 20130037343 | ADJUSTABLE STAND SUITABLE FOR SUPPORTING AN AUDIO SPEAKER - The invention relates to an adjustable stand suitable for supporting an audio speaker and comprising: a base having an upright bearing; a tilt barrel mounted on the upright bearing for adjustable rotation about its own axis; two supporting rods, each supporting rod being mounted on the tilt barrel generally perpendicular to the tilt barrel axis and adapted for movement sideways along the tilt barrel and forwards and backwards relative to the tilt barrel; and a front and rear rest disposed on each supporting rod, at least one of which is mounted for movement along the rod; and an alternative tilt platform that is less complex than a tilt barrel and supporting rods, but which permits the invention to achieve rotation and tilt for a lower-cost commercial embodiment. | 02-14-2013 |
| 20130062139 | Audio Apparatus - An audio apparatus includes a housing including a space which is enclosed at least one pair of opposite surfaces, and an open pipe including a first open end and a second open end positioned in the space. The open pipe has a pipe length of integral multiple of a substantially half wavelength of a stationary wave which is generated in the space. The first open end of the open pipe is disposed at a position of a substantial loop of the stationary wave which is generated in the space. | 03-14-2013 |
| 20100270101 | PNEUMATIC TIRE WITH NOISE DAMPER - A pneumatic tire with a noise damper made of a spongelike multi-cellular material is disclosed. The noise damper is divided into small dampers to improve the high-speed durability of the tire. The noise damper is provided with a water-impermeable outer coating to prevent water from infiltrating into the spongelike multi-cellular material during transporting, store keeping and the like. | 10-28-2010 |
| 20100263963 | Transmitted sound control apparatus - Wall partitioning between outside and inside of a room has an opening portion closed with a film. Sound insulating plate, comprising a lamination of a sound reflecting plate and a sound absorbing member, is supported in opposed relation to the opening portion and at an interval from the opening portion. Sound transmitted from outside of the room into the room through the film is reflected from the sound reflecting plate and then diffracted via sides of the interval, defined between the sound reflecting plate and the wall, to behind the reflecting plate to reach a human listener. Thus, with a mechanical construction, sound, propagated from outside the room into the room, can be made to be heard as sound of frequency characteristics desired by a human listener present in the room. | 10-21-2010 |
| 20110192675 | BAFFLE - A baffle is provided that includes at least one carrier and a sealer disposed in a recess. When placed in a cavity, such as a vehicle cavity, sealer also expands into the cavity to seal the cavity. Baffle can be modified by including an insert within carrier to increase the weight, density, and structural rigidity of baffle, without altering the exterior dimensions of baffle. A baffle that includes an insert can be customized based on a particular application, without requiring time-consuming and expensive tooling changes. | 08-11-2011 |
| 20090288910 | METHOD AND SYSTEM FOR ENHANCED HIGH INTENSITY ACOUSTIC WAVES APPLICATION - According to the invention a method (and corresponding system) of enhancing application of high intensity acoustic waves is provided, wherein acoustic waves, e.g. ultrasound, and a gaseous medium, e.g. steam, coincide at a treatment zone. This is achieved by a combination of one or more high intensity acoustic generators and/or reflectors. In this way, enhanced efficiency in an area of the gaseous medium (or where the gaseous medium is to affect something) is obtained since a second generator or a reflector is located so that the acoustic waves directly influence the gaseous medium. | 11-26-2009 |
| 20090223738 | SOUND ABSORBING STRUCTURE AND VEHICLE COMPONENT HAVING SOUND ABSORPTION PROPERTY - A sound absorbing structure is constituted of a housing and a vibration member. The vibration member composed of a synthetic resin having elasticity is constituted of a first member and a second member whose surface density is smaller than the surface density of the first member, wherein the first member is fixed into a center hole of the second member so as to form a single board of the vibration member. Since the surface density of the center portion of the vibration member is higher than the surface density of the peripheral portion of the vibration member, the frequency of absorbed sound further decreases in comparison with the foregoing structure in which the vibration member is increased in weight to change the frequency of absorbed sound. This makes it possible to arbitrarily change the frequency of absorbed sound without substantially changing the overall weight of the sound absorbing structure. | 09-10-2009 |
| 20090183942 | Sound Diffuser - A sound diffuser includes a front plate defining a plurality of sound exit holes. An outer frustoconical wall extends from the front plate, the outer frustoconical wall decreasing in diameter from the front plate. An inner frustoconical wall extends from the outer frustoconical wall toward the front plate, the inner frustoconical wall decreasing in diameter toward the front plate and defining a sound entry opening spaced apart from the front plate. A plurality of legs are coupled to at least one of the front plate and the outer frustoconical wall, the legs extending away from the front plate to contact a speaker cover. First and second straps operatively extend from the front plate, the first strap having a distal end with a fastener for connection to a speaker case. The second strap also has a distal end with a fastener for connection to the speaker case. | 07-23-2009 |
| 20110031062 | DEVICE FOR DAMPING AND SCATTERING HYDROSOUND IN A LIQUID - A device for damping and scattering hydrosound and wave motions in water includes a plurality of envelope bodies, each enclosing a gas and each spaced at a distance from one another and surrounded by the water, wherein the device is configured to receive water flowing through it in a direction of sound propagation. | 02-10-2011 |
| 20090065292 | Low Noise Fuel Injection Pump - A fuel pump assembly has a bushing defining a pumping chamber, a plunger, a cam follower piece, and a compliance device for absorbing noise by increasing either or both of a hydraulic and/or a mechanical compliance of the fuel pump assembly. The compliance device may includes a spring washer or a press-fit spring. The pump bushing and/or plunger may include a cavity as the compliance device for increasing dead volume, the cavity being in fluid communication with the pumping chamber via an orifice. A deflectable or movable mechanism is positioned within a cavity for increasing dead volume, and a solenoid varies a diameter of the orifice. The moveable mechanism includes a poppet valve having a switching pressure related to engine speed. A vehicle includes an engine, transmission, fuel rail, and a fuel pump assembly configured with at least one compliance device for absorbing a hydraulic noise component. | 03-12-2009 |
| 20100300798 | ENERGY ABSORBING COMPOSITION AND IMPACT AND SOUND ABSORBING APPLICATIONS THEREOF - A substantially non-elastic incompressible composition, which substantially does not quickly self-level under standard operating conditions, includes: a suspending agent which reacts substantially as a solid when subjected to forces below a critical force, and which becomes substantially flowable when subjected to forces above said critical force; ceramic microparticulates dispersed within the suspending agent; flexible-walled microparticulates dispersed within the suspending agent; and celled macroparticulates dispersed within the suspending agent. The composition provides an incident energy absorbing property. The incident energy may include sound energy, and the microparticulates and macroparticulates may convert some of the sound energy into heat, or may diffract the sound energy. | 12-02-2010 |
| 20100314193 | MEMBRANE STIFFENING THROUGH RIBBING FOR ENGINE SOUND TRANSMISSION DEVICE - Disclosed is an engine sound transmission device for a motor vehicle. The device includes a membrane that is selectively tuned by the addition of countermeasures provided on the membrane to selectively stiffen portions of the membrane so to attenuate undesired frequency components. The membrane countermeasures result in improved tuning of the engine sound transmitted to the passenger compartment while providing improved material savings when compared to other tuning options including a quarter wave tuner or a side branch resonator. | 12-16-2010 |
| 20110100745 | TUNABLE ACOUSTIC RELFECTOR - An acoustic reflector suitable for use as a reflective target for navigational aids and for location and re-location applications. The acoustic reflector comprises a shell arranged to surround a solid core. The shell is adapted to transmit acoustic waves incident thereon into the core. Within the core the acoustic waves are focused before being reflected from an opposing side of the shell to provide a reflected acoustic wave. The shell has at least two areas of transmissibility such that the waves incident on the shell follow separate paths within the core before being re-radiated and combining constructively to provide an enhanced reflected acoustic wave at one or more pre-determined frequencies. | 05-05-2011 |
| 20100258376 | Device to prevent noise in ladder rung assemblies - The invention is a device intended to be inserted into the hollow rungs of a ladder. The purpose of the invention is to prevent the rungs from having tube resonances during transport. | 10-14-2010 |
| 20100206660 | WATER-PROOF SOUND-TRANSMITTING MEMBRANE, METHOD FOR PRODUCING WATER-PROOF SOUND-TRANSMITTING MEMBRANE, AND ELECTRICAL APPLIANCE USING THE MEMBRANE - A water-proof sound-transmitting membrane | 08-19-2010 |
| 20120186904 | ACOUSTIC DIODE - An acoustic diode includes a phononic crystal medium, a nonlinear acoustic medium, a aluminum tubes contain the phononic crystal medium and the nonlinear acoustic medium. The phononic crystal medium is fabricated by alternately laminating a water layers and a glass layers in a periodic manner. | 07-26-2012 |
| 20130112496 | METHODS AND DEVICES FOR ELECTROMAGNETICALLY TUNING ACOUSTIC MEDIA - An acoustic material can be electromagnetically tuned to produce alterations in its acoustical properties without physical contact. The acoustic material should contain a periodic structure and a medium that has acousto-elastical properties that can be altered through the application of electromagnetic radiation. Changes in volumetric properties such as density result in changes to the velocity at which sound passes through the material. The acoustic material can be a phononic crystal that undergoes a change in its acoustic bandgap after being subjected to electromagnetic radiation. This electromagnetic tuning ability results in the ability to change the acoustic properties of various phononic devices without physical contact. | 05-09-2013 |
| 20130126264 | FERRITE SINTERED BODY AND NOISE FILTER INCLUDING THE SAME - A ferrite sintered body having an improved strength and a noise filter including the same are provided. A ferrite sintered body includes 1 mol % to 10 mol % Cu on CuO basis, a spinel-structured crystal containing Fe, Zn, Ni, Cu and O as a main phase, and Cu compound particles present at a grain boundary, having an average particle diameter of 0.5 μm to 10 μm. The ferrite sintered body includes the Cu compound particles present at a grain boundary. It is thereby possible to suppress the grain growth of the crystals serving as the main phase to attain a morphology formed of fine crystals, and also inhibit the propagation of destruction of the grain boundary, thus making it possible to achieve a ferrite sintered body with an improved strength. | 05-23-2013 |
| 20130146388 | ACOUSTIC WAVEGUIDE ASSEMBLIES - Acoustic waveguides are disclosed for mounting to a conduit. The acoustic waveguides provide a mounting area that minimizes the effect of the mount on the acoustic wave traveling through the waveguide while providing an effective seal, even under high pressure conditions. | 06-13-2013 |
| 20130146389 | Speaker - A speaker, including: a casing having a baffle plate; and a sound source fixed to the baffle plate of the casing, wherein at least one cutout is formed in the baffle plate, the at least one cutout having a configuration in which a width of the at least one cutout increases with an increase in a distance from the sound source. | 06-13-2013 |
