Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 8150078 | Electret condenser microphone An electret condenser microphone is provided that can reduce parasitic capacitance and realize enhanced sensitivity. The electret condenser microphone includes a capacitor section including a fixed electrode having an electret member and a diaphragm electrode, a cas... | 04/03/2012 |
| 8144899 | Acoustic transducer and microphone using the same An acoustic transducer comprises a substrate, a membrane configured to move relative to the substrate, a number of supports configured to suspend the membrane over the substrate, a first group of projections extending from the membrane, and a second group of project... | 03/27/2012 |
| 8027493 | Biplane line array speaker with arcuate tweeter array providing controlled directivity A biplane line array speaker includes a line array of tweeters mounted substantially directly in front of a line array of woofers. The tweeter line array is arcuately shaped to provide controlled vertical dispersion above and below the boundaries of the speaker cabi... | 09/27/2011 |
| 7460679 | Flat panel speaker system with a coated diaphragm A speaker system having a structure in which the room surrounding the first diaphragm and the room adjacent to the second diaphragm are acoustically coupled. The second diaphragm has coating on a surface. Applying the coating to the second diaphragm enhances the rel... | 12/02/2008 |
| 7418109 | Diaphragm structure of light sound converter A diaphragm (1) of a light sound converter which has a high performance, is suitable for mass-production and has a slit (1s) formed therein. A light emitting element and a light receiving element are disposed at positions opposed to a reflective... | 08/26/2008 |
| 7360626 | Audio speaker with wobble free voice coil movement A speaker that is designed to substantially eliminate wobble of the voice coil during operation, and thus remove that source of distortion and early failure of the speaker. This is accomplished with the creation of triangular ring that extends upward from the top ed... | 04/22/2008 |
| 7302061 | Dual-tweeter loudspeaker A dual tweeter speaker, wherein the tweeters are spaced far apart, is provided. The loudspeaker system includes a woofer and two tweeters, which are arranged so they reduce interference with sound waves emitted by the woofer. The spaced apart tweeters provide an imp... | 11/27/2007 |
| 7233681 | Electromagnetic transducer with eccentrically mounted voice coil former An electromagnetic transducer such as an audio speaker which includes an asymmetric diaphragm to deliver smooth frequency response with reduced distortion by reduction of common modes in the diaphragm. Other benefits such as asymmetric directivity patterns can be re... | 06/19/2007 |
| 7225895 | Audio speaker with wobble free voice coil movement A speaker that is designed to substantially eliminate wobble of the voice coil during operation, and thus remove that source of distortion and early failure of the speaker. This is accomplished with the creation of triangular ring that extends upward from the top ed... | 06/05/2007 |
| 7185735 | Audio speaker with wobble free voice coil movement A speaker that is designed to substantially eliminate wobble of the voice coil during operation, and thus remove that source of distortion and early failure of the speaker. This is accomplished with the creation of triangular ring that extends upward from the top ed... | 03/06/2007 |
| 7120264 | Sound reproducing apparatus A sound reproducing apparatus includes a display unit, a board 22, a diaphragm panel 23, and an electroacoustic transducer 26. The display unit displays an image on a display surface. The board 22 is composed of a material which transmits... | 10/10/2006 |
| 7046816 | Coincident source stereo speaker A coincident source stereo speaker in accordance with the present invention includes a high-frequency component (tweeter) and a low-frequency component (woofer) that are separated by a sound channel. The tweeter emits a first sound pattern directly outward from the ... | 05/16/2006 |
| 6963650 | Coaxial speaker with step-down ledge to eliminate sound wave distortions and time delay A coaxial speaker assembly (10) with reduced sound distortion, sound time delay, and polar response distortion. The coaxial speaker assembly (10) includes a high-frequency speaker system (16) mounted coaxially with and fitting within a lower-fre... | 11/08/2005 |
| 6925191 | Flat panel speaker A loudspeaker having a back plate, a driver attached to the back plate, the driver being responsive to an electrical signal, an enhancer having a neck and a mouth, the neck attached to the driver and movable in accordance with the movement of the driver, a thin film... | 08/02/2005 |
| 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 |
| 6888946 | High frequency loudspeaker A tweeter with a light, thin sandwich plate which can be excited into multiple reflected bending waves, and a driver which makes a vibrating contact and excites the sandwich plate, where the driver is designed for higher sound frequencies and the sandwich plate for ... | 05/03/2005 |
| 6834113 | Loudspeaker system A loudspeaker system, which has the ability to create a homogeneous sound over large distances, comprising at least one line-source of acoustical radiation, each comprising three or more essentially identical speaker-units arranged adjacent to each other at a center... | 12/21/2004 |
| 6804371 | Speaker having a laser vibration diaphragm A speaker includes a housing having a diffusion opening provided with a laser vibration diaphragm. The laser vibration diaphragm has reflective spatial patterns, so that the speaker may present multiple-image variations under different rays of light, thereby enhanci... | 10/12/2004 |
| 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 |
| 6535612 | Electroacoustic transducer with diaphragm securing structure and method An electroacoustic transducer which has at least one stator member with an operating surface and a suspended emitter diaphragm spaced from the operating surface of the stator member to enable the diaphragm to oscillate in response to an applied signal vol... | 03/18/2003 |
| 6466676 | Compound driver for acoustical applications A compound driver acoustic transducer. A frame supports a motion generator to one side of two diaphragms. An intermediate diaphragm is continuous and is driven by the motion generator. The intermediate diaphragm forms a closed volume with a solid portion ... | 10/15/2002 |
| 6445803 | Speaker The present invention relates to an improved speaker which includes at least one radiating surface configured to vibrate to produce sound waves, and an existing speaker cone configured to vibrate to produce sound waves, wherein said at least one radiating... | 09/03/2002 |
| 6351542 | Loudspeakers with panel-form acoustic radiating elements A loudspeaker (81) comprises an enclosure, an acoustic radiator (2) in the enclosure, a compliant suspension (3) mounting the radiator in the enclosure for pistonic movement relative thereto, and a first transducer (9) for driving the radiator pistonicall... | 02/26/2002 |
| 6236733 | Loudspeaker A loudspeaker has a frame, a magnetic circuit formed on the frame, a voice coil bobbin disposed in a magnetic gap of the magnetic circuit, and a diaphragm connected to the voice coil bobbin at an inner periphery and to the frame at an outer periphery ther... | 05/22/2001 |
| 6095278 | Base for holding the tweeter of a speaker A speaker base, which includes a tweeter holder having a holder base and a bottom mounting holder rod, and withholding ring mounted on the tweeter holder to hold a tweeter, wherein the tweeter holder has an axial center through hole through its holder bas... | 08/01/2000 |
| 6097821 | Electrostatic capacitance type transducer In an electrostatic capacitance type transducer which has a substrate, a movable electrode confrontingly placed to the substrate in a movable manner through a space, a fixed electrode arranged on a detecting face confronting the movable electrode of the s... | 08/01/2000 |
| 5295194 | Multi-driver loudspeaker assembly A multi-driver, coaxially mounted loudspeaker array utilizing a high frequency bi-morph driving element (tweeter) that is preferably contained within the air-core of the voice coil former of a lower frequency loudspeaker (woofer). The outwardly extending ... | 03/15/1994 |
| 5245669 | Electroacoustic transducer The invention relates to an improved piezoelectric loudspeaker for high frequency, more commonly known as a tweeter. The invention embraces a technological improvement which permits the size of the tweeter to be substantially reduced while maintaining or ... | 09/14/1993 |
| 5180785 | Diaphragm and method for producing same A diaphragm formed of a material for molding mainly composed of a uniform mixture of an ultra-high molecular weight polyolefin with a high melting viscosity and a polyolefin with a lower melting viscosity, wherein the ultra-high molecular weight polyolefi... | 01/19/1993 |
| 5181253 | Loudspeaker assembly In a loudspeaker having a yoke assembly including a top plate and a yoke fixedly attached to opposite sides of a magnet to form an air gap between the plate and the yoke into which a voice coil operatively extending from a diaphragm is positioned, the yok... | 01/19/1993 |
| 5153915 | Speaker filtering circuit and support therefor A coaxial speaker system having a high frequency component and a low frequency component is provided with a filtering circuit having an inductance coil securely mounted upon a magnet of the coaxial speaker. Mounting of this filtering circuit permits tunin... | 10/06/1992 |
| 5150417 | Bass reflex type speaker system A bass reflex speaker system with a ducted port which can be made without coloration in the mid frequency band of the speaker caused by standing wave resonances in the duct. The system includes one or more openings in the wall of the duct between the ends... | 09/22/1992 |
| 5115882 | Omnidirectional dispersion system for multiway loudspeakers A sound dispersing system using two or more vertically facing drivers in substantially coaxial alignment on a vertical axis. The drivers face conic reflectors which reflect sound radially over 360 degrees with substantial dispersion in vertical planes tha... | 05/26/1992 |
| 5098976 | Acoustic material This invention provides an acoustic material having high elastic modulus and large internal loss by subjecting a high-modulus stretched polyethylene containing paraffin wax to plasma treatment. When the acoustic material of the present invention is used f... | 03/24/1992 |
| 5073945 | Loudspeaker system An improved dipole type characteristic loudspeaker system has a pair of loudspeakers (1 and 2) which are mounted on the front baffle board (4) and the back baffle board (5) of a console (3) and are connected to be driven in each-other opposite phase relat... | 12/17/1991 |
| 5062139 | Coaxial loud speaker system A multi-driver, coaxially mounted loud speaker array utilizing a high frequency bi-morph driving element that is totally contained within the hollow core of the voice coil former of a lower frequency loud speaker. The outwardly radiating conical edge of t... | 10/29/1991 |
| 5022488 | Transducer enclosure An enclosure (10) for mounting two transducers (12, 14) includes a wall (20, 22) defining an enclosure (10) interior. The enclosure (10) also includes a wall (54 and/or 56) for dividing the enclosure (10) interior into a first portion (16) and a second po... | 06/11/1991 |
| 4965839 | Electro acoustic transducer and loudspeaker A loudspeaker transducer has a coil (5) and a metal dome (11) with a skirt (13) arranged concentrically in a magnetic gap between pol pieces (2 and 4). The skirt (13) is inductively coupled to the coil (5) but is mechanically independent of the coil forme... | 10/23/1990 |
| 4940108 | Open line source speaker system An open line source speaker system includes a first columnar cabinet enclosing a plurality of midrange or woofer speakers arranged in the cabinet in a vertical line and a second columnar cabinet enclosing a plurality of tweeters arranged in the cabinet in... | 07/10/1990 |
| 4899390 | Thin speaker having an enclosure within an open portion and a closed portion A speaker which is thin but which is capable of providing high-fidelity reproduction and ensuring a suitable level of sound pressure even when it is brought close to a wall. A closed chamber is formed behind one part of a diaphragm mounted in an enclosure... | 02/06/1990 |
