35results about How to "Remove feedback" patented technology

A repeater for re-transmitting an incoming RF signal comprising: a first antenna array for receiving the incoming RF signal; a second antenna array for transmitting an outgoing RF signal; and a transceiver for down-converting the incoming RF signal to a down-converted signal, processing the down-converted signal, and up-converting the processed signal to produce the outgoing RF signal. The first antenna array is cross-polarized with respect to the second antenna array. The repeater also comprises an echo processor for attenuating in the down-converted signal an echo signal associated with the outgoing RF signal. The echo processor delays transmission of the outgoing RF signal in order to minimize the echo signal.

A hearing prosthesis includes both a hearing aid adapted to sense and amplify low frequency acoustic sound signals and a cochlear implant system adapted to sense high frequency acoustic sound signals. The hearing aid has a first microphone adapted to sense the low frequency acoustic sound signals, amplify these sensed low frequency acoustic sound signals, and present the resulting amplified low frequency acoustic sound signals in the ear canal of a user, thereby enabling the user to better hear these amplified sounds using his or her normal hearing processes. The cochlear implant system includes a second microphone adapted to sense the high frequency acoustic sound signals and selectively stimulate the inner ear with electrical stimulation that will be perceived as high frequency acoustic sound signals. Both the cochlear implant system and the hearing aid system are coupled to operate on the same ear of the user. Feedback within the hearing aid portion of the system is eliminated by positioning the first microphone at a location that is acoustically remote from the ear canal where the amplified low frequency acoustic sound signals are presented. High frequency acoustic sound signals are better sensed by placing the second microphone at a location that is in or near the ear canal where the amplified low frequency acoustic sound signals are presented.

An active acoustic noise reduction system which comprises a single input transducer and an output actuator that are physically located next to each other in the same location. In one embodiment, the input transducer and the output actuator are a hybrid represented by a single element. The active noise reduction system is located as close as possible to the noise source and functions to generate an antinoise cancellation sound wave with minimum delay and opposite phase with respect to the noise source. The noise reduction system also comprises a non linearity correction circuit, a delayed cancellation circuit and variable gain amplifier. The system provides user control of the quiet zones generated by the system by varying the gain of the variable gain amplifier. The system provides a user with the ability In one embodiment, an echo canceler is utilized to remove echoes fed back from the output actuator. In another embodiment, an input decoder is used instead of an echo canceler to remove feedback picked up from the output actuator.

A repeater for re-transmitting signals between first and second wireless devices. The repeater comprises a first antenna array for receiving a forward channel signal transmitted from the first wireless device and a second antenna array for receiving a reverse channel signal transmitted from the second wireless device. The repeater also comprises a first transceiver chain for down-converting the received forward channel signal, processing the down-converted forward channel signal, and up-converting the processed forward channel signal to thereby produce an outgoing forward channel signal. The repeater also comprises a second transceiver chain for down-converting the received reverse channel signal, processing the down-converted reverse channel signal, and up-converting the processed reverse channel signal to thereby produce an outgoing reverse channel signal. The first antenna array comprises a first antenna element and the second antenna array comprises a second antenna element that is cross-polarized with respect to the first antenna element.

A method (100) for tracking interactions of a user with an electronic document displayed in a browser, wherein the browser is executed on a computer, comprises the steps of:determining (110) a state of visibility of the electronic document;detecting (120) a browser event;deciding, whether the event belongs to a set of pre-determined browser events indicative of the user's reading behaviour; andlogging (150) the state of visibility to a machine-readable medium, if yes.

The hearing aid system (102) has a sound-to-vibration conversion circuitry including a microphone system (108), an electronic amplifier (114) and a vibrator (120). A housing (121) accommodates the vibrator (120). The vibrator (120) is connected to an abutment (124) that goes through the skin. The abutment (124) is connected to a fixture (126) that is anchored in the skull bone (128). The sound-to-vibration conversion circuitry has an AfD converter (212) that converts an analogue microphone signal into a digital signal.

There is provided a display device, including a display panel; a first light emitting unit for inputting a first input light to the display panel based on a first light emitting signal; a second light emitting unit for inputting second input light to the display panel based on a second light emitting signal; and light emitting control unit for outputting the first light emitting signal, the second light emitting signal, the image signal corresponding to the first input light, and the image signal corresponding to the second input light; where the light emitting control unit performs output of the first light emitting signal and the image signal of the color corresponding to the first input light in synchronization in a first sub-frame, and performs output of the second light emitting signal and the image signal of the color corresponding to the second input light in synchronization in a second sub-frame.

A method and system for eliminating redundant voice recognition feedback includes receiving a voice command input at a command processor and determining a feedback requirement. The method further provides a voice command feedback based on the feedback requirement. A computer usable medium with suitable computer program code is provided for eliminating redundant voice recognition feedback.

A method for feeding back spatial channel state and a device for feeding back spatial channel state are disclosed by the invention. The method for feeding back spatial channel state according to an embodiment of the present invention includes: determining the probability of being scheduled of the spatial channel; determining feedback information based on the probability of being scheduled of the spatial channel; and transmitting the determined feedback information; wherein more feedback information is used for the spatial channel having high probability of being scheduled than that of the spatial channel with low probability of being scheduled.

A control circuit array for controlling operation of a plurality of multi-product fuel dispensers ("MPDs") in response to control inputs from a control input source. The control circuit array includes an electric power source, switches for fuel grade selection and MPD lighting and outputs to submersible turbine fuel pumps for supplying fuel to the MPDs. The improvement comprises a modular circuit board for being connected in series to form the control circuit array, wherein each circuit board includes emergency shutoff means for responding to a single emergency shutoff input for shutting off all power to each of the plurality of MPDs and the turbine pumps supplying the MPDs. The control also includes maintenance shutoff means for shutting off all power to a single predetermined one of the plurality of MPDs in preparation for performing maintenance on the single MPD or turbine pump while permitting continued operation of the remaining MPDs and turbine pumps without feedback to the MPD under maintenance from the operating MPDs.

A navigation system includes microfluidics, a piezoelectric charger, and a transceiver paired with a network connected mobile computing device sending walking navigation instructions to the navigation system. The instructions are received by the transceiver and rendered as an embossed line using the microfluidics. The embossed line is felt by a user and interpreted as a navigation instruction. Other position information, such as upcoming obstacles, gradients, and route outline, can be portrayed as an embossed line to a user using the microfluidics. Optionally, the navigation system includes one or more pressure sensors providing pressure measurements to the mobile computing device for determining the gait of a user. The analyzed pressure measurements are received by the transceiver and rendered as one or more projecting objects by the microfluidics at locations with improper applied pressure. Present invention embodiments may be utilized for guidance of visually impaired persons, and for monitoring a user's gait.

A system for regulating pressure supplied to a transmission control element, includes a control pressure source and line pressure source, a latch valve that opens and closes communication with the line pressure source in response to control pressure, and a regulator valve including a spool for regulating line pressure and producing control element pressure when the latch valve is closed, and an auxiliary piston responsive to line pressure and contacting the spool for connecting line pressure to the control element when the latch valve is open.

Multi-link suspension systems for vehicle are described having various linkage arms that connect to distinct points of a wheel mount. Each of the linkage arms are preferably coupled to the wheel mount via a spherical ball joint and mounted such that they can independently move with respect to the other linkage arms. A shock assembly is preferably mounted between two of the linkage arms on a separate links that is configured to vary its length based on movement of one or both of the two linkage arms.

A procedure and device for linearizing the characteristic curve of a vibration signal transducer such as a microphone that includes collecting signals, transmitting the signals, extracting information from the signals, dephasing such information by 180 degrees compared to the initial signals and taking the algebraic sum of the initial signals and dephased information.

The invention relates to a method for control of a flying wing. The flying wing is arranged to be controlled to move along a predetermined trajectory by means of a fluid stream passing a wing of the flying wing. The flying wing comprises at least one control surface for controlling the movement of the flying wing along the predetermined trajectory. The flying wing is positioned in a reference frame where the x-axis is directed horizontally along a level L above which the flying wing moves, the y-axis is perpendicular to the x-axis in a vertical direction and the z-axis is perpendicular to the x-axis along the level L in a direction along the principal direction of the fluid stream. The invention further relates to a system comprising a flying wing and a computer-readable medium for use with a flying wing.

The present invention is directed towards a low cost Data Access Arrangement (DAA) with improved current control for controlling the current drawn from a telephone line pair to drive the light emitting diodes (LEDs) in an opto-isolator utilized with the DAA, and to an enhanced method of sinking DC line current. Also, an improved method is provided to implement line current draw and battery detect features.

A method of controlling an adaptive head lamp including a control unit for detecting a driving signal of a vehicle to control an actuator which controls the head lamp in a horizontal or vertical direction in accordance with a control signal of the control unit, may include steps of, a) verifying whether an ignition of the vehicle is turned on or off, b) after the ignition of the vehicle is verified, driving the actuator to move the head lamp to a rightmost or leftmost position in the horizontal direction, or a lowermost or uppermost position in the vertical direction, c) driving the actuator by a predetermined number of pulses previously set in a micro stepping manner in a direction opposite to a driving direction of the headlamp at the step b), and d) setting a position of the head lamp determined at the step c) as an initial position.

A Bluetooth earphone comprises a main module, an ear hanger, a flexible connection unit, and an earpiece speaker. The main module is used for transmitting and receiving Bluetooth signals. The ear hanger is formed by a curved extension of the main module. The earpiece speaker is connected to the ear hanger by the flexible connection unit.

Rather than down-convert optical frequencies, a QCL laser system directly generates a THz frequency comb in a compact monolithically integrated chip that can be locked to an absolute frequency without the need of a frequency-comb synthesizer. The monolithic, absolute frequency comb can provide a THz frequency reference and tool for high-resolution broad band spectroscopy.

A kinetic energy storage device, a pumpjack inertia capacitor (PIC), for use with an oil well pumpjack, the PIC includes a primary shaft assembly to transfer power and torque between a prime mover of the oil well pumpjack, a flywheel assembly having one or more flywheels, and an output assembly, the one or more flywheels absorb and then transfer torque to an oil well pumping unit to enable the oil well pumping unit to operate at a near constant speed; and the one or more flywheels enable the prime mover to operate at a near constant speed and a near constant power.

A modular sound modulation system that may be incorporated into a wearable harness for use beneath a costume or clothing. The system includes a sound modulation unit having an amplifier and programmable sound modulation controller. Power is provided via a wired remote power supply. Speakers are disposed at key locations to cause modulated sound to appear to come from the head of the costume. A high-fidelity microphone captured vocalizations from the wearer. The system may further include a transmitted to broadcast or store a recording of the modulated sound.