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| Number | Title | Issue Date |
| 7254239 | Sound system and method of sound reproduction A sound reproduction system comprises a left and right speakers located in close proximity, and a sound processor which provides audio signals to the pair of speakers. The sound processor preferably derives a cancellation signal from the difference between the left ... | 08/07/2007 |
| 7218740 | Audio system An automotive in-cabin audio system comprising a plurality of speakers installed at different positions in the cabin is disclosed, in which the playback signal from a multichannel player having sources of at least three channels recorded therein is processed in acco... | 05/15/2007 |
| 7069219 | System and user interface for producing acoustic response predictions via a communications network A web hosted system and user interface in a client-server architecture permits audio designers to perform acoustic prediction calculations from a thin client computer. A client computer or other Internet connect device having a display screen is used by an audio pro... | 06/27/2006 |
| 7068800 | Speaker apparatus A speaker apparatus can ensure a large size and area of a diaphragm so as to improve reproducing capability in a low sound range and increase an output sound pressure, and can constitute a plurality of vibrating points (signal control points). An input signal Vin ha... | 06/27/2006 |
| 6993141 | System for distributing a signal between loudspeaker drivers A system for distributing a source voltage from a signal source to a number of drivers or loudspeakers is disclosed. The system includes at least one autotransformer for connection to the signal source, and a number of drivers electrically connected to the autotrans... | 01/31/2006 |
| 6956954 | Surround-sound processing system Surround-effect, providing no unnatural feeling to the listeners who sit next to each other under side-by-side basis through virtual sound sources, is realized. A surround left channel signal SL and a surround right channel signal SR are mixed with an adder 10 | 10/18/2005 |
| 6910549 | Embedded multimedia speaker structure An embedded multimedia speaker structure includes a five-facet housing having a same dimension as that of a 5-and-ΒΌ-inch disk drive; a recess disposed at a bottom center portion of the housing; a bass speaker disposed at the recess and having a bell thereof facing ... | 06/28/2005 |
| 6069962 | Point source speaker system The system of the present invention includes, briefly, a point source speaker system, comprising a processor which produces a left minus right (L-R) audio signal, a right plus left (R+L) and a right minus left (R-L) audio signal; left, center and right sp... | 05/30/2000 |
| 5400408 | High performance stereo sound enclosure for computer visual display monitor and method for construction A high quality stereophonic sound enclosure system high resolution intended for computer visual display monitors employing cathode ray tubes (CRTs) having a vertical aperture grill, and methods for construction of same. The aperture grill has a natural fr... | 03/21/1995 |
| 5321756 | Loudspeaker system with sonically powered drivers and centered feedback loudspeaker connected thereto A stereophonic loudspeaker system which includes at least two channel loudspeakers and a centrally located feedback control loudspeaker. Each channel loudspeaker incorporates an electrically driven low frequency electrosonic transducer and a sonically dri... | 06/14/1994 |
| 5181247 | Sound image enhancing A speaker system includes a left channel input and a right channel input for receiving left channel and right channel signals respectively, a left channel driver, a right channel driver, an (L-R) driver unit, and a (R-L) driver unit. The left channel driv... | 01/19/1993 |
| 5117459 | Ambient imaging loudspeaker system Sound reproduction apparatus includes a loudspeaker system having a plurality of drivers for producing audio signals in response to respective electrical right and left stereophonic signals. A first of these drivers has a voice coil wired and connected in... | 05/26/1992 |
| 5109416 | Dipole speaker for producing ambience sound A dipole speaker for use with a multichannel sound reproduction system for producing an acoustical ambience signal. The dipole speaker comprises a transducer which is connected to the sound reproduction system so that it receives a difference signal from ... | 04/28/1992 |
| 4944019 | Low sound region reproducing speaker system A low sound region reproducing speaker system comprising a box, a partition separating the internal space of the box into two spatial portions, a pair of speakers attached to the partition wall, and an aperture formed in the side wall of the box through w... | 07/24/1990 |
| 4837826 | Stereophonic baffle A stereophonic baffle comprises a first transducer group (7 to 10) located along a first line and fed by a right signal of a Hi-Fi chain and a second group of transducers (11 and 15) located according to a second line, forming an angle with the first line... | 06/06/1989 |
| 4817152 | Stereo system with piezo-electrical film speaker A stereo system produces stereo-phonic sound using a single piezo-electric film speaker. The arched film diaphragm of the speaker has one portion coupled to vibrate in response to a left stereo signal received by a first set of piezo-electric transducers ... | 03/28/1989 |
| 4764961 | Cassette type stereo speaker system A cassette type stereo speaker system comprises a body case, a screen, a vibrating sheet, a voice coil, a magnetic path system and a plug. The magnetic path system includes a yoke iron, a center magnet, and a ferrite magnet. The vibrating sheet is a very ... | 08/16/1988 |
| 4760601 | Single speaker, double tuned labyrinth type enclosure A high efficiency labyrinth type enclosure uses chambers of triangular crossectional area and a single speaker with two separate voice coils, in conjunction with two speaker back wave paths, one tuned for woofer frequencies and the other tuned for subwoof... | 07/26/1988 |
| 4704729 | Single acoustic box with spatial effect for stereophonic musical reproduction systems The single acoustic box with spatial effect for stereophonic musical reproduction systems, according to the invention, consists of an outer shell having at the top a loudspeaker for low-frequency sounds and on the lateral walls at least two loudspeakers f... | 11/03/1987 |
| 4646349 | Equipment for the stereophonic sound reproduction in a television receiver In the novel equipment for the stereophonic sound reproduction in the television receiver all essential components, such as loudspeakers, crossover networks, etc., are accommodated in one single enclosure which fits into the space above the picture tube, ... | 02/24/1987 |
| 4592088 | Speaker apparatus A speaker apparatus using the so-called motional feedback (MFB) technique in which the sound wave from a speaker (14) is detected by a microphone (10) and the output of the microphone (10) is fed back to a power amplifier (5) for driving the speaker throu... | 05/27/1986 |
| 4509184 | Stereo sound system A stereo sound system for reproducing signals from two independent channels through right and left speakers. The two speakers are centrally located and propagate a lesser part of their acoustic output directly into free space. Two acoustic tunnels separat... | 04/02/1985 |
| 4424416 | Acoustic reproducing apparatus An acoustic reproducing apparatus is provided which includes first and second channels and first and second speakers, all disposed in a housing with a sound path for acoustically coupling the first and second speakers. The sound path has disposed therein ... | 01/03/1984 |
| 4418243 | Acoustic projection stereophonic system An acoustic projection system in which a reproducer array disposed in a listening chamber and operating in conjunction with a signal processor coupled to right and left channels carrying stereophonic signals, acts to project sound into the chamber in a ma... | 11/29/1983 |
| 4350847 | Subwoofer system using a passive radiator A loudspeaker subwoofer system is disclosed which combines signals from more than one audio channel. A single enclosure mounts an active driver for each of a plurality of audio channels, which active drivers are respectively connected to each respective a... | 09/21/1982 |
| 4326099 | Low frequency cabinet, in particular for a triphonic audio network The present invention covers a low frequency acoustic cabinet. The cabinet contains two enclosures holding at least one low frequency loud-speaker so that the front face of each loud-speaker radiates inside a cavity communicating with the outside through an op... | 04/20/1982 |
| 4268719 | Loudspeaker arrangements The invention relates to a loudspeaker housing having a front wall and a back wall and at least two similar electroacoustic transducers. Objects of the invention are to create a loudspeaker having a limited or finite housing but which makes possible a sou... | 05/19/1981 |
| 4256922 | Stereophonic effect speaker arrangement A device for reproducing acoustic events carried on at least two channels, in a room with at least two sidewalls, comprising, at least one first sound-radiating transducer positioned to radiate sound toward a listener with at least two second sound-radiat... | 03/17/1981 |
| 4249037 | Pyramid loudspeakers with twin cross-phased mid-range speakers A truncated, open top, pyramid housing is provided containing a downwardly propagating woofer mounted near the base of the pyramid; a forwardly and slightly upwardly propagating tweeter mounted on the front side of the pyramid; and a pair of rearwardly pr... | 02/03/1981 |
| 4054750 | Full range rotatable speaker housing with oppositely directed speakers A plurality of speakers are carried on a generally vertical board. The board is carried for pivotal motion about a vertical axis. The board is housed within an enclosure permitting sound radiation in all directions. Some speakers are directed to face oppo... | 10/18/1977 |
| 3947635 | Integrated stereo speaker system An integrated stereo speaker system in which substantially non-directional bass sounds of low frequency are supplied exclusively to an enclosure common to right and left channels. Directional sounds in mid-range and higher frequencies are supplied to sepa... | 03/30/1976 |
