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| Number | Title | Issue Date |
| 7886869 | Acoustic waveguide mode controlling An acoustic device including a first acoustic waveguide having two open ends; a second acoustic waveguide; and an acoustic driver having a first and second radiating surface positioned so that the first: radiating surface radiates into the first waveguide and the se... | 02/15/2011 |
| 7802650 | Combination midrange and high frequency horn A middle frequency horn and high frequency horn assembly having a straight pathway with a shared unitary terminus defined by shared side walls which approach a perpendicular angle compared to the horn axis. The two air columns are separated and partially defined by ... | 09/28/2010 |
| 7510049 | Acoustic transformer and method for transforming sound waves An acoustic transformer for transforming sound waves generated by, for example, a round membrane, into a rectangular wave front with reduced interfering resonances is provided in a form of a waveguide with a generally circular entrance and a generally rectangular ex... | 03/31/2009 |
| 7392880 | Dual range horn with acoustic crossover A new approach has been developed to combine mid-range and high frequency sound into the throat of a horn designed for sound reinforcement. An acoustic low pass filter element is interposed between the lower frequency passage and the higher frequency passage, so tha... | 07/01/2008 |
| 7367423 | Speaker assembly with aiming device A speaker assembly aimable relative to a remote target. The speaker assembly comprising a sound generating device configured to project sound in a sound pattern about a sound axis. A speaker aiming device is coupled to the sound generating device for use in visually... | 05/06/2008 |
| 7299893 | Loudspeaker horn and method for controlling grating lobes in a line array of acoustic sources A loudspeaker horn (11) having a throat end (13) for receiving acoustic power from aligned acoustic power sources (41, 43, 45), an elongated throat (33), and a flared section (17) is provided with grating lobe mitigation fins (2... | 11/27/2007 |
| 7278513 | Internal lens system for loudspeaker waveguides This invention provides a lens system for a loudspeaker. The loudspeaker may include a driver unit and a waveguide attached to the driver unit. The loudspeaker further may include a lens system. The lens system may include a plurality of plates. The plates may be po... | 10/09/2007 |
| 7134523 | System for integrating mid-range and high-frequency acoustic sources in multi-way loudspeakers This invention provides a radiation boundary integrator (“RBI”) for integrating sound radiation from mid-range and high-frequency sources in multi-way loudspeakers. The RBI is a substantially solid boundary that is placed over the mid-range speakers to provide s... | 11/14/2006 |
| 7095868 | Phase plug with optimum aperture shapes A phase plug for optimally matching a drive-unit's diaphragm to the throat of a waveguide is disclosed. Specific embodiments of a circular diaphragm matched to an elliptical waveguide and a circular diaphragm to a rectangular waveguide are disclosed. ... | 08/22/2006 |
| 7068805 | Acoustic waveguide for controlled sound radiation Acoustic waveguide contours that approximate either or both of the Elliptic Cylinder and the Prolate Spheroidal coordinate systems that allows for a more accurate prediction and control over the sound radiation polar pattern are disclosed. ... | 06/27/2006 |
| 6981570 | Loudspeaker system with common low and high frequency horn mounting The invention relates generally to the field of audio loudspeaker enclosures, and more particularly to a method of mounting the internal components in the loudspeaker so as to control the loudspeaker output. Specifically a mounting structure and method for mounting ... | 01/03/2006 |
| 6957781 | Cleaning attachment for fluid dispenser nozzles and fluid dispensers using same A nozzle attachment for removing residual material retained on the dispensing nozzle of a fluid dispenser, having a retainer adapted to releasably attach the nozzle attachment to a dispensing nozzle, and a pair of hollow-bodied nozzle attachment components that defi... | 10/25/2005 |
| 6905001 | Sounders for fire alarm systems A sounder is disclosed which has walling (36, 38) defining a first air column (26) leading to a first sound aperture (34) through which the first column opens to atmosphere, and walling (40, 44) defining a second air column (60) le... | 06/14/2005 |
| 6712177 | Cross-fired multiple horn loudspeaker system The invention relates to a horn loudspeaker system. The horn loudspeaker system includes a pair of vertically displaced horns with cross-fired aiming angles. A common throat section couples the horns to a driver. A substantially asymmetrical baffling is incorporated... | 03/30/2004 |
| 6668969 | Manifold for a horn loudspeaker and method A manifold for a horn loudspeaker has an input end having at least one input port for receiving acoustic power from at least one acoustic driver, and an output end for delivering acoustic power to the throat end of the horn. The output end of the manifold... | 12/30/2003 |
| 6408080 | Boundary layer microphone A microphone may use boundary layer technology in concert with a concave reflector to produce improved sensitivity. The concave reflector may be arranged with respect to a boundary layer creating surface such that the sound waves are concentrated at the b... | 06/18/2002 |
| 6394223 | Loudspeaker with differential energy distribution in vertical and horizontal planes A loudspeaker horn, loudspeaker and a loudspeaker system wherein at least one loudspeaker includes a horn composed of a waveguide, a plurality of throats acoustically coupled to a single waveguide at their mouths and to respective drivers of a plurality o... | 05/28/2002 |
| 6393131 | Loudspeaker A loudspeaker includes a cabinet designed so as to define a central compartment sandwiched between upper and lower compartments. The cabinet is symmetrical about a vertical central, fore-and-aft extending plane. Located in each of the upper and lower comp... | 05/21/2002 |
| 6278789 | Frequency selective acoustic waveguide damping An acoustic waveguide loudspeaker system has an electroacoustical transducer having a vibratile surface. An acoustic waveguide has a first end open and a second end adjacent to the vibratile surface and an effective length corresponding substantially to a... | 08/21/2001 |
| 6112847 | Loudspeaker with differentiated energy distribution in vertical and horizontal planes A loudspeaker horn, loudspeaker and a loudspeaker system wherein at least one loudspeaker includes a horn composed of a wave guide, a plurality of throats acoustically coupled to a single wave guide at their mouths and to respective drivers of a plurality... | 09/05/2000 |
| 6059069 | Loudspeaker waveguide design A loudspeaker horn has straight wall section and a curved wall section. The straight wall section has diverging walls defining a coverage angle and the curved wall portion is connected to the straight wall portion at a point tangent thereto, and has a pro... | 05/09/2000 |
| 5925856 | Loudspeaker horn A loudspeaker horn for use with an acoustical driver has a rectangular throat opening with a long dimension relative to the wavelength of the sound pressure waves generated within the high frequency range of the horn. A relatively short pre-load chamber c... | 07/20/1999 |
| 5327985 | Acoustical transducer enclosure The present invention relates to an acoustical transducer enclosure which is particularly adapted for directing sound waves and is housed in a multisided enclosure. The enclosure has a cylindrical hollow tube, held in position by a pair of forward baffles... | 07/12/1994 |
| 5160815 | Megaphone apparatus A megaphone apparatus includes an elongate conical conduit directed into an outwardly flaring forward body portion. The conduit includes an entrance opening, with the flaring body including a plurality of exit openings defined by a central outlet conduit ... | 11/03/1992 |
| 5025887 | Sanitary acoustic horn Disclosed is a sanitary acoustic horn for use in the dairy industry for preventing powder build-up in dairy industry drying systems and for meeting U.S.D.A. requirements for equipment which comes in contact with powder product. The sanitary acoustic horn ... | 06/25/1991 |
| 5027411 | High frequency loudspeaker An improved loudspeaker assembly for frequencies higher than approximately 6 kHz, i.e., a tweeter assembly, is disclosed. The tweeter assembly includes a dome tweeter driver for delivering high frequency sound to a listener, and a cylindrical housing for ... | 06/25/1991 |
| 5020630 | Loudspeaker and horn therefor A loudspeaker for projecting sound over a listening area having a driver and a horn in which the horn has a coupling portion communicating at an interface with an outwardly flaring portion, the horn forming an elongated slot at the interface and being pro... | 06/04/1991 |
| 4969196 | Speaker and horn array A speaker and horn array having improved audio characteristics is formed in a baffle case. A plurality of small speakers are mounted in the baffle case in a vertical array in close proximity with one another. Each of the speakers has an acoustic baffle ov... | 11/06/1990 |
| 4963855 | Warning sound generating device A warning sound generating device includes a sound source member and an enclosure for protecting the sound source member. A front wall of the enclosure and a sound emitting portion of the sound source member face each other. The front wall of the enclosur... | 10/16/1990 |
| 4930596 | Loudspeaker system A loudspeaker system which comprises a loudspeaker unit for radiating a first sound, a horn unit having a throat coupled to the back of the loudspeaker for radiating a second sound, and an acoustic filter provided in the horn for causing an acoustic imped... | 06/05/1990 |
| 4865159 | Acoustic horn and attachment device Disclosed is an acoustic horn to aid in bulk powdered material handling particularly from trucks and railroad cars. Such acoustic horn is comprised of an external cone having a driver affix thereto. There is also an inverted internal cone contained within... | 09/12/1989 |
| 4845759 | Sound source having a plurality of drivers operating from a virtual point A sound source includes a plurality of drivers communicating with the common throat of a horn. The size of the radiating area of the throat is less than two or three wavelengths of the highest frequency to be produced such that the drivers operate conjoin... | 07/04/1989 |
| 4836327 | Sound reinforcement enclosure employing cone loudspeaker with annular central loading member and coaxially mounted compression driver An improved sound reinforcement enclosure is disclosed which incorporates a cone-type loudspeaker operating into a generally cylindrical channel extending from the perimeter of the cone to free air. A central member is coaxially mounted within this channe... | 06/06/1989 |
| 4685532 | Constant directivity loudspeaker horn A high-frequency constant-directivity horn including a relatively large throat driver and a relatively large throat for receiving sound from the driver, further includes a pair of vanes mounted wholly within the throat, respectively above and below the lo... | 08/11/1987 |
| 4580655 | Defined coverage loudspeaker horn Opposed side walls of a loudspeaker horn are constructed to direct portions of a sound beam toward a target over different preselected included angles, producing an incident beam which is substantially coextensive with the target. The side walls preferabl... | 04/08/1986 |
| 4469921 | Horn type loudspeaker A sectoral horn type loudspeaker includes a throat section and a sectoral part where the width of the horn at the connection therebetween is less than the wavelength of the upper limit frequency. In order to make the sound pressure characteristic flat thr... | 09/04/1984 |
| 4369857 | Loudspeaker and horn combination A loudspeaker and horn combination having desirable sound clarity characteristics and having a desirable per unit of electric power input to per unit of sound output ratio can be constructed using a horn body of one or more parts of a rigid, closed cell p... | 01/25/1983 |
| 4344504 | Directional loudspeaker A loudspeaker having uniform horizontal sound dispersion characteristics in a design angle and minimal sound dispersion vertically comprises multiple sound energy sources forming an elongated line source of sound energy, and a waveguide having an elongate... | 08/17/1982 |
| 4324313 | Exponential horn for use in horn-type loudspeakers Herein disclosed is an exponential horn for use in a horn-type loudspeaker, of which the mouth is in the form of an ellipse and the longitudinal cross-section of the horn intersected in the direction of the semi-major axis of the ellipse shaped mouth desc... | 04/13/1982 |
| 4308932 | Loudspeaker horn A loudspeaker horn having improving directivity has a pair of smoothly flared vertical sidewalls joined to a pair of smoothly flared horizontal sidewalls. In an exemplary embodiment, one pair of sidewalls is generated as a surface of revolution, with the ... | 01/05/1982 |
