69results about How to "Reduce external noise" patented technology

A head mounted display in a video/audio system includes a display device, a head mount, noise reduction devices, and a speaker. The display device is coupled to the head mount and produces visual images based on received video signals. The head mount is mounted on the user's head and is coupled to the noise reduction devices, which cover the user's ears such that external noise is reduced. The noise reduction devices are coupled together via a strap that fits around the user head. The noise reduction devices are coupled to and house speakers that produce sound signals based on received audio signals. As a result, the user may see the video images produced by the display device and clearly hear the sounds produced by the speaker, and the external noise heard by the user is reduced.

A noise canceling and communication system is described. An in-ear device is adapted to fit in the ear canal of a device user. A passive noise reduction element reduces external noise entering the ear canal. An external microphone senses an external acoustic signal outside the ear canal to produce a representative external microphone signal. An internal microphone senses an internal acoustic signal proximal to the tympanic membrane to produce a representative internal microphone signal. One or more internal sound generators produce a noise cancellation signal and an acoustic communication signal, both directed towards the tympanic membrane. A probe tube shapes an acoustic response between the internal sound generator and the internal microphone to be relatively constant over a wide audio frequency band. An electronics module is located externally of the ear canal and in communication with the in-ear device for processing the microphone signals using a hybrid feed forward and feedback active noise reduction algorithm to produce the noise cancellation signal. The noise reduction algorithm includes a modeling component based on a transfer function associated with the internal sound generator and at least one of the microphones to automatically adjust the noise cancellation signal for fit and geometry of the ear canal of the user. The communication component also includes a modeling component based on a transfer function associated with the internal sound generator and at least one of the microphones to automatically adjust the communication signal for fit and geometry of the ear canal of the user and to assure that the communication signal does not interfere with the noise reduction algorithm and that the noise cancellation signal does not interfere with passing of the communication signal.

The invention discloses a heat reflective insulating stoving varnish coating and a preparation method thereof. The stoving varnish coating comprises the following components in percentage by weight: 40-60% of a film-forming resin, 8-15% of a mixed solvent, 10-25% of an infrared reflective pigment, 1-5% of insulating powder, 6-15% of filler and 1.2-3.5% of an auxiliary, totaling 100%, wherein the film-forming resin comprises a mixture of thermosetting acrylic resin, acrylic resin and amino resin. As the film-forming resin contains the above three main resins, the stoving varnish coating has good weather ability, mechanical property and chemical resistance. As the infrared reflective pigment and heat insulating powder are added into the raw material, the coating is high in reflection efficiency of sunlight and good in insulating effect.

An earplug composed of an injected molded resilient polymeric material for insertion into an ear canal by a fingertip of a user, including an elongated member having a nose portion formed as a curved front end. An open cup shaped rearward extending flange located at the end of the elongated member opposite to the nose portion and with the open cup shaped rearward extending flange configured to receive the fingertip of the user. The elongated member including at least one flange element located intermediate the nose portion and the open cup shape flange. The nose portion and the flange element having a generally curved shape to extend into and conform to the wall of the ear canal. The earplug composed of a resilient polymer material having a relatively low Shore A Durometer hardness value and the cup shape flange portion with the inserted fingertip of the user forming a handle of greater stiffness to enable the earplug with the relatively low Shore A Durometer hardness value to be more easily inserted into the ear canal.

A phone case having a bottom wall, opposing side walls, and mouth and ear end walls that form a pocket with an opening having a rim for extending from ear to mouth and around the mouth to hide it from view and to muffle and block beyond the case words spoken into a phone nested therein. A sidewall portion of the rim may have a curved shape conforming generally to the contour of a human face from ear to mouth, and the pocket walls may be made of a flexible, sound absorbing material so that the rim of the opening is sufficiently deformable to conform substantially to the ear to mouth contour and form a sound seal when pressed against a human face. The ear end wall may form an ear portion of the rim for placement over an ear lobe to reduce interfering external noise.

A method and apparatus are disclosed for reducing noise, such as external noise, cross-talk and echo, in an unbalanced channel. A cross-talk canceller is disclosed that uses a multi-dimensional finite impulse response filter to process both the differential, d, and common-mode, c, components of a received signal. Recovery of the differential mode component of the received signal is improved by reducing the contribution of the common mode component. The common mode component of a received signal may be expressed, for example, as the average of two voltages or two current signals. The differential and common mode components of the received signal are equalized. The disclosed multi-dimensional cross-talk canceller reduces external noise; near-end crosstalk resulting from differential and common mode components on one twisted pair interfering with another twisted pair; and echo crosstalk resulting from differential and common mode cross-talk components on the same twisted pair.

A semiconductor sensor device is provided with a semiconductor sensor chip having a plurality of electrodes formed on a substrate surface and a semiconductor sensor, and a signal processing IC chip mounted on the semiconductor sensor chip by flip-chip bonding.

A control system is for a vehicle that includes an internal combustion engine. The control system includes an electronic control unit. The electronic control unit is configured to limit an output of the internal combustion engine when the electronic control unit determines that the vehicle runs in an unmanned state, such that the output of the internal combustion engine is lower the vehicle runs in the unmanned state than when the vehicle runs in a manned state.

An imaging device of the present invention, which is an imaging device for shooting images or video of a photographic subject, includes: an imaging element for taking an optical image of the photographic subject and generating image data therefrom; a main circuit board that is for conducting signal processing on the image data generated by the imaging element and that includes a main circuit board ground (“GND”) having a ground potential; an imaging element flexible cable that is connected to the main circuit board and on which the imaging element is mounted; a mount for fixing the imaging element and that includes a metallic component; and a metal plate that is connected to the mount and is disposed between the imaging element and the main circuit board. Wherein, the mount and the main circuit board GND are electrically connected.

An imaging device includes: an imaging sensor 110; a main circuit substrate 120 includes a first ground conductor; an imaging sensor cable 130 that includes a second ground conductor, has the imaging sensor 110 mounted thereon, and is connected to the main circuit substrate 120; a metal plate 150 that is disposed between the main circuit substrate 120 and an area of the imaging sensor cable 130 where the imaging sensor 110 is mounted thereon, and that is electrically connected to the second ground conductor; and a ground connection conductor 190 that electrically connects between the first ground conductor and the metal plate 150. The ground connection conductor 190 is disposed in an area where the imaging sensor 110 and the imaging sensor cable 130 overlap each other or in an area where the imaging sensor 110 and the main circuit substrate 120 overlap each other.

The invention includes a portable modularized medical unit that may be transported by airplane, helicopter, truck, rail, or ship to and from any location where emergency medical care, trauma care, surgical care, intensive care, isolation care, critical care, mass casualty, exam treatment or emergency medical evacuation are needed. The unit includes a rigid parallelepipedal frame that serves as the rigid exoskeleton of the unit that is a rigid aluminum parallelepipedal frame with a plurality of longitudinal metal tracks in the unit to provide the attachment or connection points for various medical components inside the internal portion of the portable modularized medical unit and that are rigidly attached to the interior surface of the base structure of the rigid parallelepipedal frame to provide multiple connection and attachment points for the components in an airworthy but removable manner to the base structure, walls, or roof of the rigid parallelepipedal frame so that the components internal to the unit may be attached, removed, relocated, replaced, and rearranged inside of the portable modularized medical unit.

A capacitor of a certain LC resonator, among multiple LC resonators in a band-pass filter, is arranged at a side of one main surface in a stacking direction of a multilayer body of the band-pass filter and the capacitors of the remaining LC resonators are arranged at a side of the other main surface in the stacking direction of the multilayer body. One of a pair of capacitor electrodes of the capacitor of the certain LC resonator is grounded. The one capacitor electrode that is grounded covers at least the plurality of LC resonators, as viewed from the stacking direction of the multilayer body.

A pneumatic tire has a main groove extending along a tire circumferential direction in a tread surface. A plurality of projections having different heights are provided in a groove bottom of the main groove in such a manner that an outer peripheral surface is inclined so as to repeat trough portions depressed to an inner side in a tire diametrical direction and peak portions protruding to an outer side in the tire diametrical direction along the tire circumferential direction.

A system and method for analyzing a biochip are provided. Wherein, a first modulator circuit outputs a first modulated signal with a first frequency. A first light source module output a first light beam based on the first modulated signal. A first optical signal is generated after the first light beam being emitted onto the biochip. An optical sensing module sense the first optical signal and outputting a first sensing signal. A first filter circuit filters the first sensing signal and outputting a first portion sensing signal. A first demodulator circuit demodulates the first portion sensing signal and outputting a first demodulated signal. An analog to digital converter convert the first demodulated signal to a first digital signal. A signal display module receives and display the first digital signal.

An imaging device 100 includes: an imaging element 110; a main circuit substrate 120; a mounting component 130 mounting the imaging element 110; a metal plate 150 disposed between the mounting component 130 and the main circuit substrate 120; a mount 140 supporting the metal plate 150 by connection sections 160 being fixed at at least three fixing points; elastic components 165 urging the connection sections 160 at each fixing point of the mount 140; and an electrically-conductive component 190 electrically connecting between a ground conductor of the main circuit substrate 120 and the metal plate 150. The electrically-conductive component 190 is disposed such that a connection point with the metal plate 150 is positioned in a area formed by the at least three fixing points being sequentially connected in the case of a back surface of the metal plate 150 being viewed in a direction orthogonal thereto.

A display device with a touch sensor and the like, capable of adjusting the external noise even in a state where the touch sensor is being placed on a display panel or a state where the display device with the touch sensor is being mounted into an electronic apparatus, includes a display panel, a capacitance type touch sensor provided by being superimposed on the display panel, and a distance variable mechanism which changes the distance between the touch sensor and the display panel.

A PLL-VCO based integrated circuit aging monitor, including: a control circuit, a monitoring circuit, and an output circuit. The monitoring circuit includes a reference circuit, an aging generation circuit, and a comparison circuit. The reference circuit is a PLL circuit insensitive to a parameter error caused by the aging of circuit. The aging generation circuit is a VCO circuit sensitive to the parameter error. The control circuit is connected to the PLL circuit, the VCO circuit, the comparison circuit, and the output circuit. The output end of the PLL circuit is connected to a first input end of the comparison circuit, and the output end of the VCO circuit is connected to a second input end of the comparison circuit. The output end of the comparison circuit is connected to the input end of the output circuit. The input end of the PLL circuit inputs a reference clock signal.