32results about How to "Unwanted noise" patented technology

A method and apparatus for quantizing audio signals is disclosed which advantageously produces a quantized audio signal which can be encoded within an acceptable range. Advantageously, the quantizer uses a scale factor which is interpolated between a threshold based on the calculated threshold of hearing at a given frequency and the absolute threshold of hearing at the same frequency.

An intraoperative probe system for preferentially detecting beta radiation over gamma radiation emitted from a radiopharmaceutical is described. In one embodiment, the probe system of the present invention is a probe having an ion-implanted silicon charged-particle detector for generating an electrical signal in response to received beta particles. In such an embodiment, a preamplifier may be located in close proximity to the detector filters and amplifies the electrical signal. Furthermore, a wire may be used to couple the probe to a processing unit for amplifying and filtering the electrical signal, and a counter may be utilized to analyze the resulting electrical signal to determine the number of beta particles being received by the detector. Alternatively, the wire can be replaced with an infrared or radio transmitter and receiver for wireless operation of the probe.

A system and method for selectively activating a device based on an activate command. A circuit, in low power mode, listens for an activate command. The activate command includes a preamplifer centering sequence, an interrupt signal, and an activate code. The circuit receives a signal that may or may not be an activate command, self-biases the signal based on the preamplifer centering in the preamp / gain control, then determines whether the interrupt signal is of the proper length in the interrupt circuit. If the interrupt is not the proper length, the process stops. If it is the proper length, the command is recognized as an activate command, and a data slicer compares the activate code to a prestored value. If the activate code matches the prestored value, the device is powered up. If they do not match, the device is not initiated.

An apparatus or method can be configured to receive first information indicative of respiratory effort of a subject from a first piezoelectric film sensor and second information indicative of respiratory effort of the subject from a second piezoelectric film sensor, and to process the received first and second information to produce an electronic signal output indicative of respiratory effort of the subject, the processing including averaging the received first information using a first differential amplifier and signal integrator with resistive reset to reduce differential noise and to attenuate common-mode noise, and averaging the received second information using a second differential amplifier and signal integrator with resistive reset to reduce differential noise and to attenuate common-mode noise.

An apparatus for controlling power generation of a generator mounted on a vehicle, the generator charging a on-vehicle battery, comprising a detecting device that detects information indicating the internal status of the battery that includes temperature of the battery, a power supply circuit that supplies power to the detecting device, a calculator for calculating the internal status of the battery using the information detected by the detecting device, a circuit board on which the calculator, the power supply circuit, and the detecting circuit are mounted and a controller that controls the power generation of the generator based on the internal status of the battery. The temperature sensing element is arranged on a bus bar that is electrically connected to the negative terminal of the battery, and the bus bar and the temperature sensing element are coupled thermally to each other.

A system and method for selectively activating a device based on an activate command. A circuit, in low power mode, listens for an activate command. The activate command includes a preamplifer centering sequence, an interrupt signal, and an activate code. The circuit receives a signal that may or may not be an activate command, self-biases the signal based on the preamplifer centering in the preamp / gain control, then determines whether the interrupt signal is of the proper length in the interrupt circuit. If the interrupt is not the proper length, the process stops. If it is the proper length, the command is recognized as an activate command, and a data slicer compares the activate code to a prestored value. If the activate code matches the prestored value, the device is powered up. If they do not match, the device is not initiated.

A power amplifier circuit including first and second cascade-assembled operational amplifiers having respective first inputs receiving a reference voltage across a decoupling capacitor, respective outputs of which are connected across a load and are looped back on respective second inputs, the second input of the first amplifier receiving, from a coupling capacitor, an input voltage to be amplified, the amplifier circuit including means for separately charging the coupling and decoupling capacitors, upon circuit power-on, from an off or standby state, and means for inhibiting the amplifiers at least during the separate charging.

A tub of a washing machine that prevents vibration and noise and a method of manufacturing the tub are provided. The tub includes a rear tub portion, a front tub portion located in front of the rear tub portion, and one or more linear reinforcing portions formed on at least one of the rear and front tub portions and extending in a direction parallel to a central axis of the front and rear tub portions.

This invention relates to the method and apparatus for electrostatic pickup of sound from stringed musical instruments to addresses the unique requirements of acoustic stringed musical instruments with a portable, detachable, safe-to-handle, easy-to-use, low-noise, electrostatic pickup that captures the tone of the musical instrument, is usable with common musical sound systems, avoids acoustic feedback problems associated with air microphones in live settings, and is easy to manufacture using current common materials and practices.

A method, system, and software are disclosed for improving the quality of a signal. A base signal is recursively decomposed and modified for a desired number of pyramid levels. At each level, the decomposed signal from the previous level is modified to improve one or more signal components or characteristics. The modified signal from a given level is then decomposed for the next level of the pyramidal decomposition for each pyramid level. Starting at the second to last level of the pyramidal decomposition, the improved signal of the last pyramid level is recomposed and then combined with one or more signals from the current pyramid level, resulting in an improved signal for the current level. The recomposition and combination of the improved signal of the previous level occurs for each level until the top, or level 0, of the pyramidal decomposition is reached. The improved base signal may or may not be combined with the original base signal, depending on the desired outcome. The present invention finds particular application in photography and digital film processing, whereby the illustrated method may be used to improve image quality.

A clock and data recovery circuit includes a delay-locked-loop adapted to recover data from a data stream: and a phase-locked-loop in communication with the delay-locked-loop and adapted to recover a clock signal from the data stream.

The present invention is directed to an elevator system. The elevator system comprises a car, a counterweight, at least one belt connecting the car and counterweight, and at least one sheave having a surface that engages with the belt. At least part of the surface of the sheave that interfaces with the belt has a plurality of features for reducing unwanted noise created due to the interaction between the belt and the sheave surface.

A method and apparatus for quantizing audio signals is disclosed which advantageously produces a quantized audio signal which can be encoded within an acceptable range. Advantageously, the quantizer uses a scale factor which is interpolated between a threshold based on the calculated threshold of hearing at a given frequency and the absolute threshold of hearing at the same frequency.

A semiconductor device is disclosed. The semiconductor device includes a digital audio circuit which converts an input digital signal into an analog audio signal, a DC-DC converter having a switching power source circuit, and an audible frequency determining circuit. In order that a difference between a frequency of a first clock signal for digital to analog conversion which is used in the digital audio circuit and a frequency of a second clock signal for switching control which is used in a DC-DC converter exceeds a maximum audible frequency, a frequency comparing circuit in the audible frequency determining circuit outputs a signal to a frequency changing circuit in the DC-DC converter. The frequency changing circuit causes a second oscillating circuit to change the second frequency.

A vibrating device configured to vibrate a gas inside a chassis to discharge the gas in a pulsating flow through an opening formed in the chassis includes a frame, a vibrating plate, a supporting member that is attached to the frame and that is configured to support the vibrating plate in a manner such that the vibrating plate is vibratable, and a driving mechanism that is configured to drive the vibrating plate and that includes a magnetic circuit member attached to the frame and a voice coil body attached to the vibrating plate. The voice coil body is configured to prevent the voice coil body from contacting the magnetic circuit member when the vibrating plate is vibrating and is movable by means of a magnetic field generated by the magnetic circuit member.

A power transmission apparatus includes capacitors connected in series between an active electrode and a passive electrode. A power reception apparatus includes capacitors connected in series between an active electrode and a passive electrode. When a capacitance between the active electrodes is represented by Caa, a capacitance between the passive electrodes is represented by Cpp, and reactances of the capacitors are represented by X1, X2, X3, and X4; the active electrodes, the passive electrodes and the capacitors are configured such that Cpp / Caa=X1 / X2=X3 / X4 and Cpp≧Caa are satisfied. Thus, a wireless power transmission system capable of stabilizing an operation of a load circuit in the power reception apparatus is provided.

An internal gear pump (1) for conveying a fluid by a driven pump gear wheel (3) and a ring gear (4), as a gear pair located within an enclosure, which at least partially mesh with one another. A sickle shaped part (5) is provided for sealing the free space located substantially opposite to the sealed area. A first end piece (12) and a second end piece (13) of the sickle shaped part (5) are assigned to pressure areas of the internal gear pump (1). In accordance with the invention, the two end pieces (12, 13) of the part (5) are constructed differently so as to avoid, or reduce as much as possible, both cavitations and noise.

A configurable baby cover for covering an infant in a number of situations and / or environments. A fabric portion provides privacy or shade for the infant and is shaped to ensure coverage of a user while nursing. A mesh portion provides airflow to the user and baby to prevent overheating and completes the shape of the cover. The cover has a first opening and a second opening which define a passage through the cover through which a user's torso, a baby car seat, a high chair, or other object may pass through partially or wholly. Fasteners around the second opening of the cover reduce the size of the second opening when secured and keep the cover in place on a user's shoulder or on an upper portion of a car seat or high chair.

A method for controlling a pixel including at least one photodiode capable of being connected to a sense node, the method including the steps of: a) at the beginning and at the end of a first integration period included within a second integration period, controlling the pixel to transfer the charges stored in the photodiode above a first threshold onto the sense node; and b) at an intermediate time between the beginning of the second period and the beginning of the first period, controlling the pixel to transfer the charges stored in the photodiode above the first threshold onto the sense node.

Various embodiments set forth techniques for directional sound modification. In one aspect, a system includes a plurality of audio sensors configured to acquire sound from an environment and at least one processor coupled to the plurality of audio sensors. The at least one processor is configured to determine a direction within the environment, generate an audio signal based on sound acquired from the direction within the environment, and transmit the audio signal to at least one audio output device to generate audio output. The audio output combines with sound from the direction within the environment to produce a modified sound.

A fuel door assembly may use a vibration damper made as a single part with a contact surface of the vehicle body or a contact surface of the fuel door.

An electronic device is provided that achieves a reduction in the amount of unwanted noise produced as a consequence of electrical switching associated with pulse width modulation. The electrical device includes pulse width modulation controls for providing a plurality of settings for operation of the device. The electrical device includes a system for selectively controlling the frequency of the pulse width modulation to provide a desired output operational intensity in response to a known input signal. The system includes a high frequency pulse width modulation signal module adapted to provide frequencies above the audible range of anticipated users of the device, thereby reducing or eliminating the production of unwanted noise associated with the operation of such an electrical device.

A configurable baby cover for covering an infant in a number of situations and / or environments. A fabric portion provides privacy or shade for the infant and is shaped to ensure coverage of a user while nursing. A mesh portion provides airflow to the user and baby to prevent overheating and completes the shape of the cover. The cover has a first opening and a second opening which define a passage through the cover through which a user's torso, a baby car seat, a high chair, or other object may pass through partially or wholly. Fasteners around the second opening of the cover reduce the size of the second opening when secured and keep the cover in place on a user's shoulder or on an upper portion of a car seat or high chair.

The method is for making an electric motor more efficient by iteratively changing when a processor sends activation signals to transistors to minimize a current required to rotate a rotor at a constant rotational speed. The method is also for changing a rotational direction of the rotor by switching the order in which activation signals are sent to the transistors.

A semiconductor device is disclosed. The semiconductor device includes a digital audio circuit which converts an input digital signal into an analog audio signal, a DC-DC converter having a switching power source circuit, and an audible frequency determining circuit. In order that a difference between a frequency of a first clock signal for digital to analog conversion which is used in the digital audio circuit and a frequency of a second clock signal for switching control which is used in a DC-DC converter exceeds a maximum audible frequency, a frequency comparing circuit in the audible frequency determining circuit outputs a signal to a frequency changing circuit in the DC-DC converter. The frequency changing circuit causes a second oscillating circuit to change the second frequency.

A moving coil speaker may comprise a frame, a magnet assembly fixedly mounted to the frame and having a central axis, first and second annular gaps defined by the magnet assembly and concentrically disposed about the central axis, a voice coil at least partially received within the first annular gap, a cone coupled to and driven by the voice coil, a secondary coil at least partially received within the second annular gap, and a mass coupled to and driven by the secondary coil. When variable electrical audio signals are sent from an audio signal source respectively through the voice coil and the secondary coil, the coils and their respectively associated cone and mass reciprocate back and forth in opposite axial directions, with the reciprocal movement of the cone being counterbalanced by the reciprocal movement of the mass.

The invention provides an improved way for transporting and storing golf clubs. The device secures the clubs on the outside of the bag with their shafts turned upwards and the club heads turned downwards, whereby the interior of the bag becomes available for other equipment and the center of gravity for the bag is low. The grips are separated with equal space between them making it easier to notice if a club is missing. Every club is secured and placed in a way where they do not come in contact with other clubs, preventing unwanted noise and wear. Different devices for woods, irons and putters ensure a fit for club heads of many different sizes and shapes. The racks for the wood clubs and the holder for a putter include adjustable, exchangeable and replaceable parts, making adjustments easy in order to fit different size club heads.