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| Number | Title | Issue Date |
| 7416048 | Portable terminal apparatus A portable terminal apparatus with a telephone function such as a portable telephone, for efficiently emitting a voice from a speaker from both a front face and a backside of a housing. The portable terminal has: a first cover that includes a first sound outlet for ... | 08/26/2008 |
| 7382890 | Sound reproduction device and portable terminal apparatus A sound reproduction device includes an LCD 20, which is an exemplary front panel, a case 22, and an electromechanical acoustic transducer 23. The LCD 20 is operable to perform a predetermined operation in response to an electrical signal... | 06/03/2008 |
| 7324654 | Arbitrary coverage angle sound integrator A system is disclosed for changing a coverage angle of sound produced from a loudspeaker system. The loudspeaker system includes an enclosure that projects sound at a predetermined angle. A sound integrator includes an inner surface positioned adjacent to a mid-rang... | 01/29/2008 |
| 7269270 | Standing wave reducing The frequency at which standing waves occur in a loudspeaker enclosure may be reduced by the addition of an internal barrier to the enclosure in order to lengthen the effective length of an internal dimension of the enclosure. Additionally, the internal barrier may ... | 09/11/2007 |
| 7252175 | Speaker apparatus and manufacturing method of speaker apparatus A speaker apparatus is a bass-reflex type woofer used in a speaker system, and includes a body portion for housing a speaker unit and a bass-reflex port mounted and fixed in the body portion. Further, in the speaker apparatus, a protrusion for temporarily fastening ... | 08/07/2007 |
| 7068979 | Mobile telecommunications device A mobile telecommunications device is disclosed and comprises a casing (2), an earpiece (6), and a cover (33) associated with the earpiece (6) to define a resonant cavity (34) between the earpiece (6) and the casing (2 | 06/27/2006 |
| 6996243 | Loudspeaker with shaped sound field The loudspeaker and method provide a driver of a loudspeaker that is movable parallel to an axis of movement through a center of the driver to produce sound waves. The driver is aligned with the driver plane orthogonal to the axis of movement. The driver plane is at... | 02/07/2006 |
| 6931143 | Thin enclosure electroacoustical transducing An electroacoustical transducer has an enclosure having a thickness substantially smaller than the width and the depth. The transducer includes a first rigid sheet, a second rigid sheet, and a spacing structure for spacing the first rigid sheet from the second rigid... | 08/16/2005 |
| 6859543 | Speaker system and method for making the same A speaker system and related method for making the same include a rigid, cylindrically shaped body member with opposite ends and a hollow interior which defines a sound chamber. A base is connected with one end of the body member to support the speaker system within... | 02/22/2005 |
| 6744902 | Ported loudspeaker enclosure An enclosure for one or more loudspeakers includes a housing having a top panel, a bottom panel, a front panel, a back panel and opposed end panels collectively defining a hollow interior which is open at an aperture formed in one of the panels. A baffle is mounted ... | 06/01/2004 |
| 6704425 | System and method to enhance reproduction of sub-bass frequencies A bass reflex loudspeaker system capable of optimized sub-bass ( | 03/09/2004 |
| 6704426 | Loudspeaker system A bandpass loudspeaker enclosure system including at least one electro-acoustic transducer with a vibratable diaphragm having a first acoustical coupling surface and a second acoustical coupling surface, and at least one differential area passive radiator... | 03/09/2004 |
| 6665413 | Infrasonic Helmholtz resonator An infrasonic Helmholtz resonator capable of producing clean sinusoidal frequencies in the range of 6-14 Hz is described.... | 12/16/2003 |
| 6625292 | Ported loudspeaker enclosure An enclosure for one or more loudspeakers includes a housing having a top panel, a bottom panel, a front panel, a back panel and opposed end panels collectively defining a hollow interior which is open at an aperture formed in one of the panels. A baffle ... | 09/23/2003 |
| 6493455 | Subwoofer assembly The invention relates to a loudspeaker assembly including a housing having a central driver mounting plate upon which a driver is mounted. The central driver mounting plate and the driver divide the housing into an upper compartment and a lower compartmen... | 12/10/2002 |
| 6389146 | Acoustically asymmetric bandpass loudspeaker with multiple acoustic filters In a preferred embodiment, a bandpass loudspeaker enclosure includes three sub chambers, a first one being a non-Helmholtz-reflex chamber of a sealed acoustic suspension construction, and the remaining two chambers utilizing two passive acoustic radiators... | 05/14/2002 |
| 6078676 | Speaker system with a three-dimensional spiral sound passage A compact speaker system is capable of reproducing a heavy bass sound with a superior transition characteristic. A sound radiated from a speaker unit passes through a three-dimensional spiral sound passage formed by a coaxial dual-tube structure provided ... | 06/20/2000 |
| 6021208 | Hidden speaker enclosure structure The invention herein relates to a kind of hidden speaker enclosure structure that is comprised of a sound chamber, a chamber cover, a speaker and a sound tube, of which the speaker is positioned inside the sound chamber and the chamber cover is sealed ont... | 02/01/2000 |
| 5930376 | Multiple channel speaker system for a portable computer A laptop computer is disclosed that includes an improved audio speaker system. The laptop computer typically is designed to have a first shell and a second shell that are attached together. Typically located within the first shell are a central processing... | 07/27/1999 |
| 5479520 | Loudspeaker system An enclosure (35) of a loudspeaker (37) is provided with a plurality of tubes (43) of different length via which the sound is emitted in order to achieve frequency spreading of resonance peaks in the SPL (sound pressure level) curve. The side walls (46, 4... | 12/26/1995 |
| 5461676 | Device for improving bass reproduction in loudspeaker system with closed housings The devices proposed improve low-frequency sound reproduction in loudspeaker systems using acoustically closed loudspeaker housings. In particular, the devices permit the use of loudspeaker housings with very much smaller dimensional volumes but with larg... | 10/24/1995 |
| 5455867 | Speaker apparatus and television receiver using the same The speaker apparatus of the invention having a speaker for radiating sound waves, an acoustic pipe having a slender opening and a rectangular form, with the front opening joined to the outer wall side of a cathode-ray tube and inner wall side of a cabine... | 10/03/1995 |
| 5394478 | Low frequency sound generation system for use in vehicular passenger compartments A system for low frequency sound production in vehicular passenger compartments, comprising an electrodynamic driver, having a first acoustic mass and a first acoustic compliance; and a Helmhotz resonator, affixed to one side of said electrodynamic driver... | 02/28/1995 |
| 5361380 | Woofer module for use in a television set A woofer module is provided for use in a television set, which comprises a hollow enclosure and a woofer accommodated within the enclosure for reproducing a sound of low audible frequency band. The enclosure has a first sound wave passageway extending fro... | 11/01/1994 |
| 5343535 | Loudspeaker device This invention is an audio frequency loudspeaker device with characteristics of broad frequency response, high efficiency, and simplicity. These qualities are achieved by the novel combination of a resonant pipe and an audio transducer dipole.... | 08/30/1994 |
| 5327504 | Device to improve the bass reproduction in loudspeaker systems using closed housings The housings of the devices are divided by inner walls into two or three inner chambers. One of the inner chambers adjoins the membrane of the loudspeaker. Adjoining this inner chamber a membrane is built into an opening of an inner wall. Movements of the... | 07/05/1994 |
| 5313525 | Acoustic apparatus with secondary quarterwave resonator A loudspeaker system for use as a subwoofer or other bass speaker system utilizes an enclosure with at least one speaker mounted therein and a port to form a bass reflex system. The bass reflex system is tuned to a selected low frequency range so that the... | 05/17/1994 |
| 5287412 | Arrangement for reproducing bass tones in a vehicle A sub-woofer arrangement for the reproduction of bass tones is provided in an armrest of a seat of a passenger car. The sub-woofer arrangement has a sound outlet orifice positioned so as to face a dashboard when lowered in a first position and be unobstru... | 02/15/1994 |
| 5253301 | Nondirectional acoustic generator and speaker system A nondirectional acoustic generator includes two acoustic generator units which are disposed facing each other as near as possible to the extent that diaphragms thereof do not become in contact with each other, drive units of the acoustic generator units ... | 10/12/1993 |
| 5197103 | Low sound loudspeaker system A low sound loudspeaker system is constructed of an acoustic pipe extending from the back side of a loudspeaker unit, an air chamber provided at the front side of the loudspeaker unit, and a bass reflex port provided within the air chamber. The acoustic p... | 03/23/1993 |
| 5189706 | Acoustic apparatus An acoustic apparatus comprises an inner cabinet, a vibrator mounted thereon and an outer cabinet. The inner cabinet and the outer cabinet constitute an acoustic cabinet having a closed cavity. The outer cabinet covers the inner cabinet with a predetermin... | 02/23/1993 |
| 5111509 | Electric acoustic converter In the construction of an electric acoustic converter such as a speaker for musical instruments, a tone generating unit arranged near one open end of a resonant tube is accompanied with a partition which has a central through hole and extends across the l... | 05/05/1992 |
| 5010977 | Acoustic apparatus with plural resonators having different resonance frequencies An acoustic apparatus comprises a plurality of resonators having different resonance frequencies, each of which is constituted by a closed cavity and acoustic mass for causing the cavity to acoustically communicate with an external region. A housing enclo... | 04/30/1991 |
| 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 |
| 4918738 | Structural assembly for housing an acoustical system An acoustical system for generating loud sound levels over a wider bandwidth includes a generally cylindrically-shaped cavity formed of a wall member and having front and back ends. A baffle member is disposed to close the front end of the cavity, and a r... | 04/17/1990 |
| 4870691 | Load and dispersion cell for sound A method and apparatus for sound reproduction wherein a load and dispersion cell is provided. The cell comprises walls to enclose transducer means. The transducer means have front and back surfaces and are secured within the walls. The walls form an elong... | 09/26/1989 |
| 4790408 | Coiled exponential bass/midrange horn loudspeakers Coiled Exponential Bass Midrange Horn Loudspeakers which are each characterized by a rigid cabinet of selected size having a sealed air chamber in the base thereof for receiving a low frequency speaker, or driver, and a coiled or convoluted, exponentially... | 12/13/1988 |
| 4728933 | Miniature dual cavity ringer A ringer employs a low-cost miniature transducer, having a reverberant cavity, mounted in a cylindrical housing which has a second reverberant cavity in front of the miniature transducer. A very large acoustic output power is achieved when the ringer is e... | 03/01/1988 |
| 4413198 | Piezoelectric transducer apparatus An electroacoustic loudspeaker apparatus is provided including a piezoelectric driver element, the opposed major surfaces of which are acoustically coupled into first and second resonant structures. The first resonant structure exhibits a resonant frequen... | 11/01/1983 |
| 4008374 | Loudspeaker systems A bass unit for a loudspeaker system which has a pair of loudspeakers mounted one behind the other in a casing to define a chamber of air therebetween. The loudspeakers are operated in phase with one another so that the pressure of air in the chamber rema... | 02/15/1977 |
