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"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 8064626 | Loudspeaker apparatus A loudspeaker apparatus includes an acoustic diaphragm; a support member having a housing, which is a hole in a surface of the support member facing the acoustic diaphragm; a magnetostrictive actuator having a magnetostrictor and a drive rod coupled to an end of the... | 11/22/2011 |
| 7903834 | Curve fitted electrodynamic planar loudspeaker A curve fitted planar loudspeaker minimizes variation and dead zones in the sound field propagated by an array of the loudspeakers. The curve fitted loudspeaker provides a plurality of sound generating transducers. The diaphragm is curved and each adjacent section f... | 03/08/2011 |
| 7483544 | Audio device post extension and angling system One embodiment of the invention provides a post extension system frame assembly for mounting fixtures within a recess in a wall or ceiling and that can be adjusted and installed with minimal time and effort. One feature of the invention provides a post extension mec... | 01/27/2009 |
| 7426278 | Sound device provided with a geometric and electronic radiation control A sound device for carrying out a homogenous sound cover for a public addressed area includes an electroacoustic source network (1), wherein each electroacoustic source (1) diffuses a version delayed by a delay (3), filtered by a filter (4 | 09/16/2008 |
| 7366314 | Speaker clearance arrangement for a communication device Disclosed is an enclosure for a speaker for a communication device. The enclosure comprises: a surface; a speaker grill located in the surface, the grill having an opening therein providing an air channel to the speaker; and at least one structure located in a first... | 04/29/2008 |
| 7352875 | Speaker apparatus The present invention provides a speaker apparatus which has a simple structure and a high directivity and which can emit sound. The speaker apparatus includes a hood having an opening at a front end with a sound reflecting inner wall shaped like a rotating surface ... | 04/01/2008 |
| 7296653 | Sound control apparatus A sound controlling apparatus adapted for combination with a speaker unit, comprising a stand configured to support the speaker unit, a reflecting panel or panels associated with the stand to reflect sound waves transmitted by the speaker unit, a side panel or panel... | 11/20/2007 |
| 7260228 | Optimum driver spacing for a line array with a minimum number of radiating elements The loudspeaker has a first pair of drivers arranged in a line, a center point along the line, wherein the pair of drivers are substantially centered about the center point with a center to center distance, d0, between the drivers in the first pair of dri... | 08/21/2007 |
| 7201251 | Modular speaker cabinet A speaker cabinet design for providing adjustability of the number of speaker cabinets contained in a speaker array comprises female connectors (50) along the front and back edges on the top and right sides. A user of the cabinet can attach a mating second ca... | 04/10/2007 |
| 7178628 | Speaker assembly A pivoting panel-mount speaker assembly comprises a speaker housing. The speaker housing has a perimeter flange portion, an exterior housing wall extending rearwardly from the perimeter flange portion, and an interior curved track extending rearwardly from the perim... | 02/20/2007 |
| 7155027 | Home theater in a box speaker mount with integrated mounting tool The invention discloses a single anchor screw speaker mount 10 with substantially tool free installation where the speaker mount 10 itself can be utilized as the mounting tool. Utilizing a surface specific screw 52, speaker mount 10 is af... | 12/26/2006 |
| 7142680 | Multiple waveguide coaxial ceiling loudspeaker A flush mountable ceiling speaker (10) with individual coaxial waveguides (20, 22) for both the lower and high-frequency transducers (11, 12). The lower frequency radiation is combined with the sonic energy radiated by the high-frequency transdu... | 11/28/2006 |
| 7130432 | Speaker mounting system and method A system and a method for mounting a speaker unit (12). The system (12) containing a surface mounting bracket (14) including at least one attaching feature (20) and a speaker unit (12). The speaker unit (12) comprises at lea... | 10/31/2006 |
| 7123725 | High intensity infrasonic tunable resonant acoustic test cell An apparatus and method are provided for high intensity acoustic test cells that employ the Helmholtz resonator principle, incorporating at least one moderately-sized volume or test cell that is tunable to a given infrasonic to low-sonic frequency and generates soun... | 10/17/2006 |
| 7102344 | Circuit tester A circuit testing device includes a housing that is sized and adapted to securely fit into a light bulb socket. The device includes spring-loaded prongs which securely hold the housing in place in the socket until it is desired to remove the testing device. The test... | 09/05/2006 |
| 7088838 | Speakerphone accessory assembly An acoustic accessory is provided having a loudspeaker and a circuit board disposed therein. An acoustic suspension system is formed within the acoustic accessory by board retention rings disposed within the upper and lower housings of the accessory. The board suspe... | 08/08/2006 |
| 7036781 | Connecting unit for the angle-adjustable connection of at least two loudspeaker enclosures, and correspondingly connected loudspeaker enclosures The invention relates to a connecting unit for the angle-adjustable connection of at least two loudspeaker enclosures. There are provided a first supporting part (13), which can be assigned to one loudspeaker enclosure (11), and a second supporting par... | 05/02/2006 |
| 7030522 | Exciter for directly vibrating board An exciter for directly vibrating a board, which enables a sufficient rotational torque to be obtained by a work tool at the time of attachment or detachment, provided with a magnetic circuit unit having an outside yoke comprised of a side wall and a bottom, a perma... | 04/18/2006 |
| 7027605 | Mid-range loudspeaker A midrange loudspeaker for operation in conjunction with low-frequency and high-frequency loudspeaker modules in a theater sound system, having a reduced depth for deployment in limited space. The midrange module is configured with a plurality of drivers and a waveg... | 04/11/2006 |
| 7024002 | Method and apparatus for spatially enhancing the stereo image in sound reproduction and reinforcement systems Sound reproduction and reinforcement systems and methods are presented herein for spatially enhancing stereo images typically used such performances as those involving music. The embodiments seek to expand the amount of audience area that would receive a sound image... | 04/04/2006 |
| 7013020 | Speaker cabinet Side plates, constituting side surfaces of a speaker cabinet, each comprise a base member having a plurality of grooves formed in its outer surface (obverse surface) region at predetermined intervals, and a decorative plate adhesively bonded to the outer surface of ... | 03/14/2006 |
| 7006648 | Speaker cabinet with increased air circulation efficiency The present invention is to provide a speaker cabinet comprising a hollow case in which a top and a bottom thereof both are wavily tapered from a pair of opposite edges of a front opening to a rear thereof. By utilizing the wavy, rearward taper design of the top and... | 02/28/2006 |
| 6961438 | Loudspeaker system having wide-directional characteristics A loudspeaker system having wide-directional characteristics includes a loudspeaker body having a polyhedron shape, preferably of dodecahedron and a plurality of speakers disposed on outer surfaces, respectively, of the polyhedron-shaped loudspeaker body in a manner... | 11/01/2005 |
| 6955241 | Speaker unit for low frequency reproduction The invention provides a speaker unit for low frequency reproduction wherein distortion is reduced and the orientation of a sound image of the lower side frequency region is augmented. To that end, the phase characteristic in an actually used frequency band is made ... | 10/18/2005 |
| 6949074 | Method and apparatus for fetal audio stimulation The present invention is a method and apparatus for applying a focused, directed audio beam at a fetus to stimulate the fetus in utero. An ultrasound signal is amplitude modulated with an audio range signal, and directed to an ultrasound transducer positioned on the... | 09/27/2005 |
| 6937740 | Monopole low frequency test woofer A monopole low frequency test woofer (10) has a rigid mounting plate (12) with an acoustical opening (14), a monopole driver (16) with a high mass cone and low resonance mounted on the mounting plate with the basket (13) of the dri... | 08/30/2005 |
| 6862358 | Piezo-film speaker and speaker built-in helmet using the same A flat piezo-film speaker is mounted in a motorcycle helmet. The flat-piezo film speaker is formed from a flat piezo-film curved in one direction to form at least one curved portion. A radius R of curvature at the curved portion is larger than at least 200 mm, prefe... | 03/01/2005 |
| 6810127 | Clear sound side fill center fill A loud speaker enclosure being made in two parts with each of the side panels cut into angle form to assist in angle adjustment, alone with pivot hinges and friction lid supports used to hold it's angled position. The enclosure can be modified to accommodate any des... | 10/26/2004 |
| 6801631 | Speaker system with multiple transducers positioned in a plane for optimum acoustic radiation pattern A speaker system features a plurality of transducers arranged to produce a sound field similar to that of an acoustic point source. The arrangement of transducers optimizes the sound field by reducing the sound energy directed towards the primary reflective surfaces... | 10/05/2004 |
| 6778675 | Speaker device In a speaker device including a plurality of speakers outputting different frequency bands, for a listener listening to sound from the speaker device, a first emitting direction of a first speaker emitting a high frequency band is oriented toward the listener more t... | 08/17/2004 |
| 6721431 | Prismatic loudspeaker/microphone array An audio array for receiving or generating audio signals. The audio array includes first, second and third audio elements and first second and third structures. Each of the first second and third structures are right triangles. The first second and third audio eleme... | 04/13/2004 |
| 6718044 | Fetal communication apparatus A fetal communication device includes a wireless microphone for transmitting audio signals to be communicated to the baby. The communication device includes a rigid housing adapted for a comfortable fit to the mothers abdomen. The communication device also includes ... | 04/06/2004 |
| 6681024 | Device including a built-in electroacoustic transducer for optimum speech reproduction A device (8) which includes an electroacoustic transducer (7) for the acoustic reproduction of sound signals to an ear (14) of a user (2) who assumes a user position at the device. The transducer is optimized for the acoustic reproduction of speech-signal... | 01/20/2004 |
| 6665412 | Speaker device The present invention relates to a speaker device or the like capable of stably providing desired directivity provided by a combination of omnidirectionality and bidirectionality down to ultra low frequencies. A speaker (22) is attached to one end face of... | 12/16/2003 |
| 6648098 | Spiral acoustic waveguide electroacoustical transducing system The invention features an acoustic waveguide and system for transmitting pressure wave energy produced by an electroacoustical transducer in a medium that propagates pressure wave energy. The acoustic waveguide and system includes a tube defining a spiral... | 11/18/2003 |
| 6628797 | Loudspeaker-and-pre-stressed cabinet Disclosed is an improved loudspeaker comprising a pre-stressed cabinet and a loudspeaker unit fixed to the inside of the cabinet. The cabinet comprises a hollow conical assembly including two conical bodies of high-rigidity metal, one press-fitted into th... | 09/30/2003 |
| 6628792 | Back to back mounted compound woofer with compression/bandpass loading The back to back mounted compound woofer that improves sound quality by minimizing mechanical vibrations is provided. The woofer speakers of the present invention are under compression allowing for more efficient cone motion control resulting in a lower c... | 09/30/2003 |
| 6603862 | Spherical loudspeaker system By providing a spherically shaped housing or enclosure containing one or more drivers or speakers motors, and cooperatively mounting the housing in association with a uniquely constructed reflector, a spherical loudspeaker system is achieved which control... | 08/05/2003 |
| 6477356 | Sounding-body holding device A sounding-body holding device comprises: a cover 1 having turn stoppers of a sounding body 3 and a fitting portion for receiving pawls of a holding member in a fitting manner; a cushion 2 having a net attached to the side thereof which is brought into cl... | 11/05/2002 |
| 6385324 | Broadband loudspeaker A broadband loudspeaker radiating as an approximate point source, whose movable components are fastened to a dome-shaped loudspeaker front, wherein the loudspeaker front flares rearwardly to an enclosure shell disposed coaxially around the central axis of... | 05/07/2002 |
