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| Number | Title | Issue Date |
| 8320597 | Acoustic dock for portable electronic device An accessory for a portable electronic device having a speaker uses an acoustic wave guide to passively amplify and direct the output of the device's speaker. The accessory has a housing with a docking cavity formed therein. The docking cavity has supportive sidewal... | 11/27/2012 |
| 8130994 | Waveguide A waveguide configured to function as a high frequency waveguide for a high frequency sound source mounted to the waveguide, and to function as an acoustical low pass filter for a low frequency sound source mounted behind the waveguide in a multi-way loudspeaker sys... | 03/06/2012 |
| 8103036 | Speaker device and television receiver using the speaker device A loudspeaker device includes a loudspeaker box having a space therein, a loudspeaker unit, and a passive radiator. The loudspeaker unit and the passive radiator are attached to the loudspeaker box. The space of the loudspeaker box has a depth smaller on the passive... | 01/24/2012 |
| 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 |
| 7426281 | Electrodynamic acoustic transducer The invention relates to an acoustic transducer generating a sound radiation by compression and expansion of an air mass situated between a mobile membrane and a fixed surface or between two mobile membranes. The present invention concerns a transducer or acoustic l... | 09/16/2008 |
| 7409071 | Large-diameter arcuate speaker In an arcuate array of speakers (100) the wind component of air motion near each speaker is converted into sound because the wind is trapped within the arc, and therefore the bass response is improved. The array acts like a single large speaker, of diameter e... | 08/05/2008 |
| 7275621 | Skew horn for a loudspeaker A horn including a substantially flat coupling flange defining a coupling flange plane, a substantially planar mouth defining a mouth plane, an elongated throat extending between the coupling flange and the mouth, a transducer for generating a sonic output operation... | 10/02/2007 |
| 7252176 | Reflex-ported folded horn enclosure A low frequency exponential/hyperbolic hybrid folded horn enclosure intended for use in proximity with at least one planar surface, such as a floor, ceiling, or wall, with access to the horn throat from the top of the enclosure. The horn is bifurcated at the throat ... | 08/07/2007 |
| 7178629 | Electroacoustic public address unit with acoustic horn or waveguide A horn or waveguide public address unit, enabling to adapt the dispersion characteristics of the horn or waveguide. The unit is provided with at least one profiling component (21a, 21b) constituting a removable dispersion shaper, capable ... | 02/20/2007 |
| 7177437 | Multiple aperture diffraction device A horn assembly for high frequency acoustic speakers. In an array of speakers, a spacing between adjacent speakers needs to be less than the wavelength of sound being emitted in order to combine effectively. For high frequency sound, a relatively small wavelength im... | 02/13/2007 |
| 7167415 | Transducers for focusing sonic energy in transmitting and receiving device Ultrasonic transducers which include at least one internally directed generally concavely configured sonic energy radiating element which directs sonic energy toward at least one arcuate energy reflecting surface which redirects and focuses the energy through an ope... | 01/23/2007 |
| 7162049 | Ported loudspeaker system and method with reduced air turbulence, bipolar radiation pattern and novel appearance A loudspeaker system includes a cabinet with an interior air volume, a transducer, a first port extending from an opening in the front wall of the cabinet to the interior of the cabinet, and a second port extending from and opening in the rear wall of the cabinet to... | 01/09/2007 |
| 7134523 | System for integrating mid-range and high-frequency acoustic sources in multi-way loudspeakers This invention provides a radiation boundary integrator (“RBI”) for integrating sound radiation from mid-range and high-frequency sources in multi-way loudspeakers. The RBI is a substantially solid boundary that is placed over the mid-range speakers to provide s... | 11/14/2006 |
| 7095868 | Phase plug with optimum aperture shapes A phase plug for optimally matching a drive-unit's diaphragm to the throat of a waveguide is disclosed. Specific embodiments of a circular diaphragm matched to an elliptical waveguide and a circular diaphragm to a rectangular waveguide are disclosed. ... | 08/22/2006 |
| 7044265 | Constant directivity acoustic horn An improved throat (2) for transmitting acoustic energy from a source driver unit (7) to a feeder section (3) of a directivity controlling acoustic horn is disclosed. The throat (2) comprises: a circular throat entrance (2i)... | 05/16/2006 |
| 7039211 | Horn-loaded compression driver system A horn-loaded compression driver or a loudspeaker has a phasing plug with multiple slots and a common annular chamber. The slots extend from an inlet side to the common annular chamber, which extends to an outlet side. Each slot has a path length extending to a comm... | 05/02/2006 |
| 7013019 | Thermoset composite material baffle for loudspeaker This invention provides a baffle formed from a thermoset composite material such as Bulk Molding Compound (BMC), Thick Molding Compound (TMC), or Sheet Molding Compound (SMC). Due to the physical properties of BMCs, TMCs, and SMCs, the baffle may be molded to minimi... | 03/14/2006 |
| 7010138 | Loudspeakers A loudspeaker comprising a phase uncorrelated diffuse sound source and a duct or wave guide coupled to the sound source to direct acoustic energy from the source, the duct or wave guide having a substantially parallel section extending from the vicinity of the sound... | 03/07/2006 |
| 6798888 | Mount for underwater acoustic projector A mount for acoustic transducers has a resilient sheet with a plurality of mounting apertures therein. Each mounting aperture has an annular groove formed about the inside surface of the sheet to accommodate one of the acoustic transducers. A pair of rigid, acoustic... | 09/28/2004 |
| 6785395 | Speaker configuration for a portable electronic device A portable device includes a speaker with an active vent fed by a front of a speaker diaphragm and a larger passive vent fed by a rear of the speaker diaphragm. The outputs of the active and passive vents are acoustically coupled to respective active and passive por... | 08/31/2004 |
| 6756883 | Extra loud low frequency acoustical alarm assembly The invention is an improved piezoelectric noise-making and audible signaling device which produces a distinctive 2 KHz tone that is more pronounced and significantly easier to perceive, especially in a noisy environment. The volume of the audible tone is amplified ... | 06/29/2004 |
| 6754360 | Signal-horn A signal-horn has an electromagnetically actuated oscillating membrane coupled to an acoustic amplifier having a volute wound duct formed of a first length with generally constant section having an inlet for the sound signal and a second length with variable section... | 06/22/2004 |
| 6704425 | System and method to enhance reproduction of sub-bass frequencies A bass reflex loudspeaker system capable of optimized sub-bass ( | 03/09/2004 |
| 6681023 | Radial pickup microphone enclosure A sound pressure waveguide consisting of an input acoustic channel, a compression zone and exit channel with an optional termination baffle. The shape and length of the waveguides are varied to adjust sound pressure gain and to achieve varied sound pickup... | 01/20/2004 |
| 6658127 | Speaker system having an amplifying horn Disclosed is a speaker system that can be advantageously used in a television set. The speaker system has a support member which is provided with a partition wall and mounted on both sides of the television cabinet. A speaker is securely installed in the ... | 12/02/2003 |
| 6650760 | Loudspeaker An upper base/low mid loudspeaker comprises a conical driver and a channel defined by a housing and a central member. The central member has a portion extending into the cone to form a first generally ring-shaped region whose cross-sectional area increase... | 11/18/2003 |
| 6512450 | Extra loud low frequency acoustical alarm assembly The invention is an improved piezoelectric noise-making and audible signaling device which produces a distinctive 2 KHz tone that is more pronounced and significantly easier to perceive, especially in a noisy environment. The volume of the audible tone is... | 01/28/2003 |
| 6466680 | High-frequency loudspeaker module for cinema screen A high-frequency cinema loudspeaker module for deployment behind a perforated cinema screen is configured with a waveguide to compensate for the beam-spreading effects of the perforated screen at the high end of the frequency range and to facilitate and c... | 10/15/2002 |
| 6393131 | Loudspeaker A loudspeaker includes a cabinet designed so as to define a central compartment sandwiched between upper and lower compartments. The cabinet is symmetrical about a vertical central, fore-and-aft extending plane. Located in each of the upper and lower comp... | 05/21/2002 |
| 6343132 | Loudspeaker The present invention provides a loudspeaker capable of matching a sound image and a picture image on a screen of an image reproducer with each other in simple construction and a simple method of installation. The loudspeaker is located above the image re... | 01/29/2002 |
| 6059069 | Loudspeaker waveguide design A loudspeaker horn has straight wall section and a curved wall section. The straight wall section has diverging walls defining a coverage angle and the curved wall portion is connected to the straight wall portion at a point tangent thereto, and has a pro... | 05/09/2000 |
| 6028947 | Lightweight molded waveguide device with support infrastructure The present invention is a waveguide device having a body of molded, foam plastic with a speaker end and an open end and an even number of segments with a flat surface in a plane parallel to the speaker end. The segments have inside wall surfaces which fl... | 02/22/2000 |
| 5991421 | Radially expanding multiple flat-surfaced waveguide device The present invention is a waveguide for an acoustic speaker having a predetermined cone weight. The waveguide body has a speaker end and an open end and an even number of segments with a flat surface in a plane parallel to the speaker end. The segments h... | 11/23/1999 |
| 5909490 | Omnidirectional audio in a communications device An approach for omnidirectional audio in a communications device has a communications device housing having a front housing including an opening; an earpiece transducer that directs sound waves through the opening; an audio transducer positioned within th... | 06/01/1999 |
| 5878148 | Compression driver Compression driver with a voice coil 3 which can move in an annular air gap 2 of a magnetic system 1 and with a diaphragm driven by the voice coil 3. The diaphragm 5 and compression chamber 12 are of annular design and compression chamber 12 is connected ... | 03/02/1999 |
| 5828627 | Method of and apparatus for producing spherical waves in the ultrasonic range A generator for spherical ultrasonic waves can replace a point source transducer and has a large-area transducer whose output ultrasonic waves are condensed in a funnel and fed to a monomodal waveguide, e.g. a tube at the output end of which phase-correct... | 10/27/1998 |
| 5825900 | Loudspeaker housing for video display appliance A loudspeaker housing for a video display appliance including a front housing to which a loudspeaker is engaged and a rear housing is disclosed. According to the present invention, the front housing has a main channel and a pair of subsidiary channels, th... | 10/20/1998 |
| 5818942 | Multimedia stereo sound source A speaker enclosure providing improved stereo base response and directionality for multimedia computer applications is disclosed. The enclosure directs low end frequencies into a mixing chamber which directs these frequencies out through a central exit po... | 10/06/1998 |
| 5809154 | Ported loudspeaker system and method A vent loudspeaker system is provided which has at least one active driver and a port opening in a speaker cabinet. Disks or baffle plates are mounted a predetermined distance to and concentric to the port opening, resulting in a vented system achieving a... | 09/15/1998 |
| 5734728 | Portable sound speaker system and driving circuit therefor A speaker system includes a vertically oriented elongated tube supported on a ground surface, and open at upper and lower ends thereof; a woofer, mid-range speaker and tweeter mounted at a lower end of the tube, the woofer having a front driving face with... | 03/31/1998 |
