| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 381349000 | Bass reflex (e.g., rear wave) | 26 |
| 20080199033 | HIGH OUTPUT SUB-WOOFER - A speaker system with an enclosure having at least six sides. At least two active transducers are mounted inside the enclosure. Each active transducer is oriented to project from one of the sides. At least four passive radiators are mounted inside the enclosure. Each passive radiator is oriented to project from one of the sides. The number of active transducers and passive radiators equals the number of sides on the enclosure. | 08-21-2008 |
| 20080205682 | HIGH OUTPUT LOUDSPEAKER - A loudspeaker system includes a speaker enclosure having an opening in a front wall, and a speaker manifold mounted within the speaker enclosure and communicating with the opening. The speaker manifold includes a pair of substantially parallel side walls, a back wall, and top and bottom walls, defining a manifold chamber. The wall opposite the back wall is substantially open to define a manifold opening and to permit the communicating. The manifold opening is substantially in alignment with the front wall opening. A woofer is mounted on a first wall of the speaker manifold. An acoustic vent is mounted on a second wall of the manifold, such that the woofer and the acoustic vent face each other at one of about a ISO degree angle or about a 90 degree angle. | 08-28-2008 |
| 20090003639 | 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 and constructed so that the first radiating surface radiates sound waves into free air and the second radiating surface radiates sound waves into the acoustic waveguide so that sound waves are radiated at the open end. A source of opposing sound waves in the acoustic waveguide opposes a predetermined spectral component of the sound waves radiated into the acoustic waveguide to reduce the acoustic radiation of the predetermined spectral component from the acoustic waveguide. | 01-01-2009 |
| 20090016556 | SOUND SYSTEMS FOR MODEL RAILROAD LOCOMOTIVES - On-board model railroad speaker enclosure designs are presented that allow maximum sized speakers, improve impedance matching of sound to the outside of the locomotive, and isolate back and front speaker waves while maintaining the standard horizontal drive-train in model train locomotives. | 01-15-2009 |
| 20090202095 | SPEAKER DEVICE - There is provided a speaker device in which a baffle plate that forms an acoustic space is formed of a resin material, and a step is provided at an opening for fixing a diaphragm in this baffle plate so that the diaphragm is positioned by this step. It is thereby possible to improve strength of the baffle plate and strength of the speaker device. | 08-13-2009 |
| 20090208048 | LOUDSPEAKER WITH REDUCED ROCKING TENDENCY - A loudspeaker ( | 08-20-2009 |
| 20090268934 | Reflex Loudspeaker Structure - The invention relates to a reflex loudspeaker construction ( | 10-29-2009 |
| 20100329496 | Apparatus with adjustable speaker arrangement - Apparatus includes a housing, the housing including a first body part and a second body part, the first body part being moveable relative to the second body part, wherein the housing has a first configuration when the first body part is in a first position relative to the second body part between and a second configuration when the first body part is in a second position relative to the second body part; and a speaker arrangement, wherein the speaker arrangement comprises a transducer, a front cavity coupled to a first side of the transducer, and an opening. The opening connects the front cavity to an exterior of the housing. A rear cavity is coupled to a second side of the transducer, the second side of the transducer being on an opposite side of the transducer to the first side of the transducer. The speaker arrangement has a first physical arrangement when the housing is in the first configuration and a second physical arrangement when the housing is in the second configuration, the first physical arrangement being different to the second physical arrangement. | 12-30-2010 |
| 20100329497 | Speaker-transducer with its own Bass-Reflex and maximum efficiency cooling - This is a novel speaker design which introduces its own internal bass-reflex. This design improves over existing designs in that it leads to acoustics that are more natural and of higher quality and, that it also leads to much improved cooling for the speaker's voice coil. | 12-30-2010 |
| 20110019855 | BASS SOUND AMPLIFYING ENCLOSURE, WOOFER INCLUDING THE SAME, AND ELECTRONIC DEVICE INCLUDING THE WOOFER - Provided is an enclosure including a rear chamber, a speaker unit chamber disposed adjacent to the rear chamber and connected to the rear chamber such that air flows between the speaker unit chamber and the rear chamber, a front chamber disposed adjacent to the speaker unit chamber and connected to the speaker unit chamber such that air flows between the speaker unit chamber and the front chamber, and a duct having a first side connected to the front chamber such that air flows between the front chamber and the duct and a second side opened to the outside, wherein the rear chamber, the speaker unit chamber, the front chamber, and the duct are disposed between a first plate and a second plate that are spaced apart from each other. | 01-27-2011 |
| 20110081035 | Miniaturized receiver assembly for in-ear noise-isolating earphones - An in-ear device comprises inter alia a miniaturized receiver assembly of sandwich construction with a front plate and a back plate and an electro-dynamic receiver therebetween, the assembly providing a bass-reflex design with a front resonator. | 04-07-2011 |
| 20120033843 | AUDIO DRIVER - An audio driver comprising a diaphragm ( | 02-09-2012 |
| 20120177238 | ACOUSTIC REPRODUCTION DEVICE - According to one embodiment, an acoustic reproduction device includes a loudspeaker unit, a loudspeaker rear chamber unit, and a port unit. The loudspeaker unit generates a sound wave. The loudspeaker rear chamber unit includes a chamber portion in which the loudspeaker unit is arranged, and at least one of a duct portion and a branch portion. The duct portion and the branch portion each have a volume, a cross-sectional area, and a length different from those of the chamber portion. A port unit is connected to the loudspeaker rear chamber unit and has a port to externally output a rear wave. The duct portion guides the rear wave from the loudspeaker unit up to the port unit. | 07-12-2012 |
| 20120300967 | SPEAKER SYSTEM - A speaker system includes: a speaker cabinet; a speaker unit installed in a wall surface of said speaker cabinet; and an acoustic tube having ends, one of which is open and the other of which is closed, in which said acoustic tube is provided in said speaker cabinet such that a side wall surface of said acoustic tube crosses a direction in which standing waves propagates, the waves occurring inside said speaker cabinet. | 11-29-2012 |
| 20130004008 | REFLEX ENCLOSURE - A reflex enclosure, includes an enclosure body, a loudspeaker, a waveguide portion and a vibration unit; a rearward sound wave generated from the loudspeaker is guided 360 degree (in all directions) from the outside of the waveguide portion to the inside of the waveguide portion, and then push the vibration unit to generate vibration to generate a corresponding sound wave, thereby reducing a standing wave ratio of the rearward sound wave in a sound room to obtain a better timbre. Furthermore, the length of a rearward sound wave guiding distance can be extended, allowing the sound wave to have the effect of extending toward a low frequency compass. In addition, the rearward sound wave is allowed to compress to increase a vibration unit pushing force, thereby obtaining a better sound effect. | 01-03-2013 |
| 20140219490 | ACOUSTIC LAYER IN MEDIA DEVICE PROVIDING ENHANCED AUDIO PERFORMANCE - An acoustic layer is added to a laptop-type personal computing device, comprising: enclosing walls, optionally—one or more microphones, a signal processing device, at least one audio transducer, and an acoustic waveguide. The acoustic layer adjoins one or more internal areas of a laptop-type device. The signal processing device receives an internal signal from a laptop-type device. The signal processing device provides a directive sound enhancement of the audio input signals based on room acoustics, such as reverberation, echo, noise, delay, frequency response, and/or speaker-positional information that is determined by the signal processing device. The audio transducer device generates an audible audio output in response to an audio signal output from the signal processing device. The acoustic waveguide receives the audible audio output and generates an enhanced bass audio output from the acoustic waveguide. | 08-07-2014 |
| 20150055812 | AUDIO BASS RESONATOR - A headphone comprising: at least one speaker housing comprising at least a first surface with a first opening and a second surface with second opening; at least one resonator designed to cover at least a portion of the second opening of the second surface; at least one speaker, at least a portion of the speaker disposed within the speaker housing proximate to the first opening of the first surface of the speaker housing. | 02-26-2015 |
| 20150086057 | BASS REFLEX LOUDSPEAKER SYSTEM WITH PHASE CORRECTION ELEMENT - A loudspeaker system has a loudspeaker housing that comprises at least a first and a second housing chamber. The loudspeaker system has a bass loudspeaker that is mounted on a partition between the first housing chamber and the second housing chamber, wherein the back of the bass loudspeaker has the first housing chamber present and the front of the bass loudspeaker has the second housing chamber present. The partition contains at least one bass reflex opening. A phase correction element is arranged at the front of the bass loudspeaker in the second housing chamber. The bass reflex opening opens into the second housing chamber and is arranged in a region adjacent to the phase correction element. | 03-26-2015 |
| 20150139466 | LOUDSPEAKER AND MANUFACTURING METHOD THEREOF - The present invention provides an improved loudspeaker enclosure comprising two opposing end sections arranged at a distance from each other and enclosing sections which connect the end sections over said distance, wherein the inner volume of the enclosure is defined by said sections. The enclosure also has a reflex port which comprises a reflex opening which is provided to the enclosure and adapted to exhaust internal pressure from the inner volume to outside the enclosure. The reflex port further comprises an inner reflex port former which connects the inner volume of the enclosure to the reflex opening for forming the reflex port. The reflex port former is formed by molding as an integral inner wall section which extends inwards from the inner surface of either or both end section. On the other hand the reflex port former extends adjacent to an enclosing section which at least partially surrounds the reflex port former such that the reflex port is formed to a space between the reflex port former and the adjacent enclosing section. | 05-21-2015 |
| 20160014502 | SPEAKER | 01-14-2016 |
| 20160088386 | LOUDSPEAKER SYSTEM AUDIO RECOVERY IMAGING AMPLIFIER - The present invention is a small high fidelity full spectrum speaker, which arranges a passive speaker and two active speakers such that fidelity of a larger speaker or one with a cross-over network is achieved. | 03-24-2016 |
| 20160105743 | SPEAKER BOX STRUCTURE OF ELECTRONIC DEVICE - A speaker box structure of an electronic device, includes: a left side speaker box having: a left side wall part; and a first opposed wall part which has a region where a distance in a lateral direction from the left side wall part to the first opposed wall part continuously varies; and a right side speaker box having: a right side wall part; and a second opposed wall part which is opposed to the first opposed wall part in an intermediate part in the lateral direction, and which has a region where a distance in the lateral direction from the right side wall part to the second opposed wall part continuously varies. | 04-14-2016 |
| 20160127824 | WOOFER SPEAKER AND THE REAR SOUND CAVITY FORMING METHOD THEREOF - A woofer speaker is provided, comprising a woofer speaker unit, a first sealing pad, a second sealing pad and a housing. The first sealing pad is fixed closely with the outer edge of the housing; the woofer speaker unit is fixed and sealed within the housing by the first sealing pad, and the second sealing pad is located between the woofer speaker unit and the housing; a sound hole is provided on the housing, and the shape and size of the sound hole correspond to those of the woofer speaker; and the terminal installation plane is the rear cover of the woofer speaker, and together with the housing forms the rear sound cavity of the woofer speaker through the first sealing pad. The cavity of the woofer speaker provided by the invention and the installation terminal applying the woofer speaker resolve the rear cover vibration problem of ultra-thin woofer speakers. | 05-05-2016 |
| 20160134955 | SPEAKER, TELEVISION PROVIDED WITH THE SPEAKER AND MULTIMEDIA DEVICE - A speaker, a television provided with the speaker and a multimedia device are provided. The speaker includes a box body and a plurality of transducer units installed within the box body by means of parallel connection: front sound cavities of the plurality of transducer units are independent of each other, respectively; and the plurality of transducer units share one back sound cavity. The speaker possesses such advantages that it has a high sound pressure level output and a smaller power consumption, it is usable to reduce the back-cavity acoustic resistance, and it is usable to raise the lower frequency limit in the low frequency range. | 05-12-2016 |
| 20160205465 | Speaker Back Cavity | 07-14-2016 |
| 20190149909 | BASS REFLEX TUBE FOR A LOUDSPEAKER | 05-16-2019 |
