528 results about "Woofer" patented technology

An acoustic control system for an electronic musical instrument, which can obtain optimal acoustic characteristics irrespective of whether or not a low range speaker is attached to a body thereof. A piano body has high range and mid range speakers. A low range speaker is removable from the body. A stand-excluding switch designates a first speaker-use mode for using the high range and mid range speakers alone, and a stand-including switch designates a both speaker-use mode for using both the high range and mid range speakers and the low range speaker. A ROM stores stand-excluding and stand-including factors for setting acoustic characteristics in the two modes, respectively. A CPU reads one of the factors, which corresponds to the mode designated by the stand-excluding or stand-including switch. A tone generator circuit generates a musical tone signal to be reproduced in one of the modes, based on the read factor.

A system and method for minimizing the complex phase interaction between non-coincident subwoofer and satellite speakers for improved magnitude response control in a cross-over region. An all-pass filter is cascaded with bass-management filters in at least one filter channel, and preferably all-pass filters are cascaded in each satellite speaker channel. Pole angles and magnitudes for the all-pass filters are recursively calculated to minimize phase incoherence. A step of selecting an optimal cross-over frequency may be performed in conjunction with the all-pass filtering, and is preferably used to select an optimal cross-over frequency prior to determining all-pass filter coefficients.

An image display device (10) has a main display body (1) provided with a thin display unit (2), a low-frequency loudspeaker (woofer) (3) and two middle and high frequency loudspeakers (tweeters) (4a, 4b) and a stand (8) supporting the main display body (1). The stand (8) has a base (6) being just opposite at its top surface to a duct outlet of the woofer (3) , thereby sound emitted from the duct can be constantly absorbed by and reflected from the base and provided with the stable quality without influence of the floor's material. A housing containing the first loudspeaker and a pair of the second loudspeakers has a plurality of through holes formed in a first area corresponding to an aperture of each loudspeaker (3, 4a, 4b) and a plurality of blind holes formed in a second area surrounding the first area, wherein the second area for the first loudspeaker is different in peripheral shape and / or size from the second area for each of the second pair of loudspeakers. The above arrangement can attain an improved sound field expanding effect by using one woofer and two tweeters, attaining the sophisticated design of the loudspeaker system.

A portable entertainment device including a right bay, a center bay and a left bay. The right and left bays are used to house the electrical speakers used in the portable entertainment device and the center bay is used to house both permanently mounted electronics and electronic modules which can be shared between the portable entertainment device and an automotive vehicle. Modules such as satellite receivers, DVD players, MP3 players and the like can comprise the portable modules. The right bay, center bay and left bay are integrated by way of a tubular structure wherein tubular structure forms inner chambers which are used to accommodate batteries, electrical power cords, and can also function as the pressure equalization port for a woofer style speaker housed in one of the bays.

The present invention discloses methods and systems for providing very high quality audio playback using all-digital wireless paths from a source to speaker transducers and / or headphones located anywhere within a distance allowed by the FCC. Each speaker has a separate digital amplifier dedicated to each transducer within it (e.g. woofer, tweeter). The present invention also discloses a system that provides a data link capable of sending an all-digital, full-bandwidth, signal from the original digital source material to each separate transducer in the system without using sound degrading lossy data compression. This system is designed to read, broadcast, and reproduce with accurate audio loudspeaker time-alignment (<100 uS) and low overall latency (less than 7 milliseconds) all popular audio formats in full-bandwidth and without data compression in the effort to maintain the integrity of the entire audio signal, wherein the audio signal may include an accompaniment to a player piano.

An audio-video (AV) system in one embodiment includes a mounting apparatus for mounting the system to a wall support located behind a wall surface and within an in-wall space. The mounting apparatus includes a support member for supporting at least one component in a support space within the in-wall space, a display mounting member 30 for mounting a display device, and a removable wall opening cover for concealing at least a portion of the in-wall space that would otherwise be visible through a wall opening to a viewer. Various multimedia-supportive devices, including loudspeakers and a subwoofer, may be concealed behind the cover in the in-wall space.

A gaming machine is provided with easily installable and serviceable components. The gaming machine includes a gaming cabinet having a main door and a lower door. A lock assembly is attached to the gaming cabinet. The lock assembly has a lock support with front panel, a first side panel, and a second side panel. At least gaming machine access control device is disposed in the front panel of the lock support, and a flange is disposed on the first side panel to connect with a mount on the gaming cabinet. A hinge pin extends through the second side panel of the lock support about which the lock assembly rotates when the main door of the gaming cabinet is open. A subwoofer is slidably mounted to a platform in the gaming machine and is secured in place with a locking element via a single fastener.

The first signal not higher than a predetermined frequency is output to a subwoofer out of the multichannel reproduction signals supplied from a sound source and, at the same time, the second signal higher than the predetermined frequency is output to a plurality of non-closed type headphones and the signals are processed for each of the channels corresponding to a plurality of headphones, considering links of the low tones to be output from the subwoofer according to the first signal and medium to high tones to be output from the plurality of non-closed type headphones according to the second signal.

A beam control system and method. The system includes an illuminator for providing a first beam of electromagnetic energy at a first wavelength; a source for providing a second beam of electromagnetic energy at a second wavelength; and an arrangement for compensating wavefront errors in the second beam using a bias representative of a comparison between the first wavelength and the second wavelength. In the illustrative embodiment, the arrangement includes a processor which corrects wavefront errors using a bias representative of a difference between said first wavelength and said second wavelength. In the disclosed application, a target wavefront sensor is included and the laser is a high-energy laser beam. The wavefront errors include a chromatic aberration and the errors are compensated using a deformable mirror and a correction algorithm executed by an adaptive optics processor. In one alternative embodiment, the errors are compensated using an optical aberration corrector. The aberration corrector may be a holographic optical element or other suitable device. In another alternative embodiment, the errors are corrected with the above embodiment in combination with the use of “woofer” and “tweeter” correcting elements with the woofer being a long stroke low frequency element and the tweeter being a short stroke high frequency element.

Wirelessly linking a portable audio device to an external audio system permits the external audio system to generate audible signals that enhance local playback of audio by the portable device. For example, the portable device wirelessly transmits lower frequency components of an audio signal to a subwoofer system for reproduction of bass frequencies extending below the playback capability of the portable device. In this manner, the external audio system provides bass enhancement for the portable audio device. Wireless transmissions between the portable audio device and the external audio system may be, but are not limited to, optical or radio frequency (RF) transmissions. Where RF signaling is used, the wireless link may be based on wireless network links, such as those supported by Bluetooth and 802.11b standards, or based on, for example, dedicated RF interfaces.

An image display device has a main display body provided with a thin display unit, a low-frequency loudspeaker (woofer) and two middle and high frequency loudspeakers (tweeters) and a stand supporting the main display body. The stand has a base being just opposite at its top surface to a duct outlet of the woofer, thereby sound emitted from the duct can be constantly absorbed by and reflected from the base. A housing containing the first loudspeaker and a pair of the second loudspeakers has a plurality of through holes formed in a first area corresponding to an aperture of each loudspeaker and a plurality of blind holes formed in a second area surrounding the first area, wherein the second area for the first loudspeaker is different in peripheral shape and / or size from the second area for each of the second pair of loudspeakers.

A stand on which a flat panel display main body is placed has low-pitched sound speakers built therein and a speaker of the flat panel display main body and the low-pitched sound speakers of the stand are combined together to construct a powerful sound system with large sound volume. The low-pitched sound speakers are located at the back side of the flat panel display main body when the flat panel display main body is placed on the stand. In a flat panel display apparatus composed of the flat panel display main body having the speaker built therein and the stand supporting this flat panel display main body thereon, it is possible to easily realize a powerful sound system using the low-pitched sound speakers (woofers) without requiring any extra space.

A furniture unit including a compartment that contains and conceals a subwoofer, wherein the compartment has vent openings that allow air and sound to pass freely between the subwoofer compartment and the outside of the furniture unit while concealing the subwoofer from the view of a person sitting within a typical viewing angle of a television that is placed on top of the furniture unit or mounted on the wall above the unit.

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 speaker, with the sound pattern having a corresponding high frequency center axis. The sound channel is located between the tweeter and woofer and is symmetrically oriented around the high-frequency component. The woofer emits a second sound pattern into the sound channel for re-direction out of the speaker. With this configuration, the second sound pattern has an effective low frequency center axis that is coincident with the high frequency center axis. As a result, the tweeter and woofer exhibit co-axial performance characteristics, even though they are not physically located co-axially.

A low frequency loudspeaker driver has a replaceable diaphragm assembly permitting a user to re-cone a blown woofer when in the field. In one embodiment, the peripheral edge of a loudspeaker driver diaphragm comprises a flexible surround and is releaseably supported within a basket having a peripheral mounting flange clamping surface to which a rigid ring-shaped clamping member or gasket is releaseably attached. A parts kit includes a replacement cone assembly with a frustoconical cone having an attached annular surround at the large cone end and a flexible spider attached near the small cone end, adjacent the attachment point for the cylindrical voice coil former. The spider includes a rigid ring mounted at the spider peripheral edge and dimensioned to be removably fastened to the driver basket.

A loudspeaker, and particularly, a woofer, including a flat diaphragm transducer having at least one stator plate for carrying magnetic elements in close proximity to a low stiffness diaphragm wherein a piston-like motion of the diaphragm is achieved by creating pressure zones adjacent the diaphragm to improve an acoustic coupling and increase acoustic output for a given size of diaphragm by the provision of non-uniformly spaced openings in the at least one stator plate which are selectively spaced to control low frequency diaphragm resonance modes.

A method for controlling a plurality of media rendering devices in a data network with a controller device in communication with the network is disclosed. A network enabled subwoofer is added to the data network such that the subwoofer is visible on the network to a controller. The controller user interface displays a subwoofer graphical object and a group graphical object representing a group of one or more rendering devices. A user selects the group graphical object via the controller user interface, and the subwoofer is joined with the selected group. An audio channel associated with the group is assigned to the subwoofer. The controller user interface hides the subwoofer graphical object.

In addition to output the mid-high range audio sound from the speakers of the main unit, the present invention can output the low range audio sound according to the audio signal transmitted from the main unit through the DC power supply transmission cable from the sub-woofer unit of the AC adapter. Accordingly, the present invention can provide a richly expressive acoustic space without enlarging the size of the main unit.

An improved electrically conductive membrane pump / transducer. The electrically conductive pump / transducer includes an array of electrically conductive membrane pumps that combine to generate a desired sound by moving a membrane (such as a membrane of PDMS), a piston, and / or by the use of pressurized airflow in the absence of such a membrane or piston. The electrically conductive membranes in the array can be, for example, graphene-polymer membranes. The electrically conductive pump can include mid-range, tweeter, and sub-woofer speakers.

A protecting case assembly with foldable slim speaker for portable apparatus includes a protecting case attached with two hinge members and two slim speakers, like electret speakers, each attached with a hinge. Two hinges are correspondingly connected to the two hinge members so as to make the two slim speakers be rotatable between a close position and an open position. Furthermore, a resonance chamber of the protecting case receives a woofer. Next, the protecting case assembly can receive external multimedia signals from a portable apparatus through a Bluetooth module and output the signals through the electret speakers and the woofer to perform high quality sound effects. Therefore, according to the protecting case assembly, the user can use it to protect the portable apparatus whilst conveniently carrying better sound equipment in order to enjoy a high quality audio and video performance anytime and anywhere.

An embedded multimedia speaker structure includes a five-facet housing having a same dimension as that of a 5-and-¼-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 downward; a circuit board having play function disposed at an rear end of an interior of the housing and for controlling sounds; a panel enclosing a front end of the housing, and having a speaker provided at two sides thereof, respectively; and two sound guide tubes having an end thereof connected to a rear end of the speakers, respectively, and the other end thereof arranged to an exterior of the housing, respectively. Using the aforesaid structure, a multimedia speaker is assembled for disposing within a 5-and-¼-inch disk drive housing.

A vehicular horn device of an existing electromagnetic type is used as a dynamic speaker so as to generate a false engine sound. The shortage of a low-pitched sound in a parametric speaker device is complemented with a false engine sound which the vehicular horn device generates. Thereby, without need of mounting a large-sized dynamic speaker such as a woofer in a vehicle, a false engine sound is generated so as to model for a real engine sound. In addition, as the vehicle approaches a pedestrian, a sound tone of the false engine sound which the pedestrian hears changes, enabling the pedestrian to easily notice the approach or presence of the vehicle.

The invention discloses a woofer comprising a round flat-panel-shaped vibrating diaphragm, the vibrating diaphragm comprises a rigid ball top located at the center position and a ring folding part located at the edge position, and the ball top is of a flat-panel-shaped structure. The woofer further comprises an outer shell, the vibrating diaphragm is combined on the upper lateral face of the outer shell, wherein a plurality of voice coils arranged in a distributed mode are combined on the surface, close to the outer shell, of the vibrating diaphragm, the voice coils drive the vibrating diaphragm to vibrate in a balanced mode, each voice coil corresponds to an independent magnetic circuit system, and the magnetic circuit systems are contained and fixed in the outer shell. According to the structure, the thickness of the woofer is reduced, and therefore the woofer of the structure can be applied to thin-type electronic devices and is favorable for thinning of the electronic devices.

A bass loudspeaker apparatus capable of according with a horn-type midbass in both the appearance and acoustics is disclosed. A bass loudspeaker apparatus A is provided with a cabinet 70 having an inner space 75 and a sound emission opening 71 in a front section; a corn-type woofer 3 disposed within the cabinet 70; a baffle plate 2 having a woofer mounting section 72 and vertically disposed in the inner space 75 so as to face the sound emission opening 71; a resonant chamber 73 defined in front of the baffle plate 2 for communicating with the sound emission opening 71. The front ends of the loudspeaker apparatuses A and 80 are approximately aligned in the state that the sound source position of the bass loudspeaker apparatus A is aligned with that of the horn-type midbass 80. Thus, the uniformity in the appearance is secured. The resonant chamber 73 and the sound emission opening 71 are respectively designed such that resonance occurs between an air mass around the periphery of the sound emission opening 71 and an air spring within the resonant chamber 73 at a predetermined frequency range of 150 through 400 Hz. Therefore, the distortion in the frequency characteristic produced in the resonant chamber 73 can be easily corrected.

A compact bass speaker cabinet uses a long, narrow, tapered waveguide that acts as does a small radial portion of the air outside a large pulsating sphere, and has the same bass response as the large pulsating sphere. The smaller end is closed and the longer end is open. In one embodiment the inside of the waveguide is a rectangle about an inch thick and substantially as wide as the speaker or speakers that are mounted on the wider surface close to or slightly overlapping the closed end; and the inside surfaces are tapered so that they meet at a point which lies beyond the closed end by a distance equal to the radian wavelength of the longest sound wave that is to be produced.

A system and method provide at least a single stage optimization process which maximizes the flatness of the net subwoofer and satellite speaker response in and around a cross-over region. A first stage determines an optimal cross-over frequency by minimizing an objective function in a region around the cross-over frequency. Such objective function measures the variation of the magnitude response in the cross-over region. An optional second stage applies all-pass filtering to reduce incoherent addition of signals from different speakers in the cross-over region. The all-pass filters are preferably included in signal processing for the satellite speakers, and provide a frequency dependent phase adjustment to reduce incoherency between the center and left and right speakers and the subwoofer. The all-pass filters are derived using a recursive adaptive algorithm.