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| Number | Title | Issue Date |
| 8135156 | Sound reproduction device with enhanced low-frequency sound effect This invention is to provide a sound reproduction device including a tube, a loudspeaker and a resonance unit, wherein the loudspeaker includes a frame body having a side adjacent to a first diaphragm thereof peripherally fixed to a first opening of the tube, and th... | 03/13/2012 |
| 7426280 | Electroacoustic waveguide transducing An acoustic waveguide system, having source of acoustic radiation and a source of opposing acoustic radiation. An acoustic waveguide has an open end and an interior. A first acoustic driver having a first radiating surface and a second radiating surface is arranged ... | 09/16/2008 |
| 7426282 | Head set speaker and stereo playing device A head set speaker and stereo radio playing device exhibits improved harmonics and acoustic fidelity. A resilient and flexible headpiece is sized to fit behind the head of the user. Right and left device enclosures are carried by the ends of the headpiece, and are a... | 09/16/2008 |
| 7207413 | Closed loop embedded audio transmission line technology for loudspeaker enclosures and systems An acoustic impedance matching enclosure is provided having a driver loaded into a chamber buffering the throat/mouth of a closed loop transmission line. Transmission line consists of a termination member, outer and inner enclosure walls, high-density lining and thr... | 04/24/2007 |
| 7123735 | Method and apparatus to increase acoustic separation A method and apparatus for reducing the acoustic coupling between a sound receiving transducer and a sound transmitting transducer is disclosed. A housing, wherein the receiving transducer and the transmitting transducer are mounted, is provided to increase the acou... | 10/17/2006 |
| RE39330 | Speaker system and a method for improving sound quality thereof A speaker system suppresses standing waves generated in the system and reproduces clear and dynamic bass sound. The system includes a cabinet formed of acoustic insulation walls, and at least one partition wall situated inside the cabinet to form a space by surround... | 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 |
| 6996030 | Apparatus and method for minimizing reception nulls in heterodyned ultrasonic signals A focal point reflector is used in conjunction with a dual heterodyne circuit to reduce reception nulls that can occur when performing ultrasonic measurements. The focal plane reflector is a flat non-porous or reflective material, such as printed circuit board (PCB)... | 02/07/2006 |
| 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 |
| 6675932 | Speaker housing configured to minimize standing waves and resonate above the frequency range of transducers This invention provides a speaker enclosure that minimizes or defuses standing waves and minimizes resonance within the operating frequency range of its transducers. To minimize standing waves, the speaker enclosure has no two surfaces that are parallel t... | 01/13/2004 |
| 6636610 | Loudspeaker systems By providing an enclosure having an acoustically optimum size and an effective or virtual air volume for optimum performance, a loudspeaker system is realized which is able to faithfully reproduce desired input signals, particularly, lower frequencies or ... | 10/21/2003 |
| 6625291 | Diffused resonance loudspeaker enclosure method The present invention includes a loudspeaker system having at least one loudspeaker drive unit; at least one loudspeaker enclosure for housing the loudspeaker drive unit(s), the loudspeaker enclosure(s) having resonating chamber(s), wherein the loudspeake... | 09/23/2003 |
| 6574344 | Directional horn speaker system A directional speaker system includes an enclosure having an inner surface, an outer surface, an open end, and a closed end, a speaker driver directed toward the open end and mounted near the closed end of the enclosure, an in-line phase plug mounted in f... | 06/03/2003 |
| 6320971 | Speaker system and a method for improving sound quality thereof A speaker system suppresses standing waves generated in the system and reproduces clear and dynamic bass sound. The system includes a cabinet formed of acoustic isolation walls, and at least one partition wall situated inside the cabinet to form a space b... | 11/20/2001 |
| 5452025 | Television set with sound-reflecting sidewalls A television set has a cabinet, a cathode-ray tube and first and second speakers having respectively first and second centerlines. The cabinet is formed with first and second sound-reflecting sidewall portions and with first and second open portions facil... | 09/19/1995 |
| 5446792 | Reflection-type speaker apparatus A speaker apparatus includes a speaker having a diaphragm, a frame having a mouth and a reflector. The speaker is mounted inside a cylindrical box, and the frame is formed cylindrically and covers over the diaphragm. The mouth opens perpendicular to an ax... | 08/29/1995 |
| 5373564 | Transmission line for planar waves A high fidelity loudspeaker having a driver, e.g., a woofer in a housing, is rear-loaded by a folded passage, i.e., a transmission line, closed at one end by a loudspeaker and open to the environment at the other end. The line has a length equal to the qu... | 12/13/1994 |
| 5369712 | Speaker Present invention relates to a speaker which is installed and utilized to the various kinds of the audio systems, it is comprised that in the backward of the speaker, a frame main body having a noise filtering means is installed so that the whole voice fr... | 11/29/1994 |
| 5216210 | Loudspeaker system with passive sound reflective intensifier A loudspeaker system including a cabinet and at least one loudspeaker mounted on the cabinet which includes a movable speaker element for directing acoustical wave energy to the ambient atmosphere and to the interior of the cabinet. A passive radiator is ... | 06/01/1993 |
| 5012889 | Speaker enclosure A loudspeaker enclosure accommodates at least one speaker in the front wall of the enclosure. The interior of the enclosure is divided into two smaller chambers by means of a partition inclined with respect to the front and rear walls. One such chamber is... | 05/07/1991 |
| 4979219 | Piezoelectric speakers A piezoelectric speaker comprises a drive unit having an auxiliary diaphragm bonded with a piezoelectric transducer element for producing sound thereby and a horn member having a resonance device including a reflection cover defining a plurality of first ... | 12/18/1990 |
| 4924962 | Sound reproducing apparatus for use in vehicle A sound reproducing apparatus for use in a vehicle having a speaker system constituted by at least one acoustic duct and a speaker unit disposed at a throat of the acoustic duct, an opening formed at the other end of the acoustic duct facing the passenger... | 05/15/1990 |
| 4893343 | Dual diverging manifold loudspeaker system A dual diverging manifold loudspeaker system includes a generally cubically-shaped outer horn housing and an inner dome-like cap member for encapsulating therebetween a compression driver assembly. The loudspeaker system includes a back plate member which... | 01/09/1990 |
| 4875546 | Loudspeaker with acoustic band-pass filter A loudspeaker having means for acoustically impeding excursion of the transducer diaphragm and means for acoustically attenuating the output of acoustic vibrations of frequencies above a preselected frequency. The loudspeaker includes first and second sub... | 10/24/1989 |
| 4628528 | Pressure wave transducing A loudspeaker driver has its front surface adjacent one end of a low loss acoustic waveguide and its rear surface adjacent to one end of a second acoustic waveguide that is one third the length of the first. The other openings of the waveguides face air a... | 12/09/1986 |
| 4385211 | Reflex horn speaker with a waterproofing device A reflex horn speaker with a waterproofing device for use on a ship or the like is disclosed. The reflex horn speaker comprising a sound generator, an inner cylindrical horn, a conical reflector concentrically arranged around the inner horn, and an outer ... | 05/24/1983 |
| 4122302 | Two way dynamic and electrostatic speaker enclosure with side vent for greater high frequency dispersion An electroacoustic transducer, especially an electrostatic speaker embodying a conductive perforated backing plate, a dielectric membrane carrying a conductive coating, and an intervening spacing layer formed of acoustically porous or transparent dielectr... | 10/24/1978 |
| 4051919 | High fidelity speaker enclosure A high fidelity speaker array comprises a full range speaker board, a pair of tweeter boards disposed at an angle of from 120° to 165° with respect to said full range speaker board, and a pair of midrange speaker boards disposed at an angle between 5° ... | 10/04/1977 |
