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

A feed gas drying system is described for a PSA or VPSA oxygen concentrator. A membrane dryer is inserted into the feed gas path to the concentrator absorbent beds, such that the moisture in the feed gas is directed to a part of the dryer exposed to the concentrator exhaust, thus achieving efficient operation of the membrane dryer with no loss of concentrator feed gas.

A system for providing rechargeable energy onboard a marine vessel, the system including an energy storage device aboard a marine vessel, an interface device connected to the energy storage device configured to provide power to charge the energy storage device and / or provide power from the energy storage device to the marine vessel, a converter device connected to the interface device configured to convert power to alternating current and / or direct current, depending on an intended purpose of the system, and a conditioning device connected to the converter device, interface device, and / or energy storage device, and configured to establish an acceptable power level and / or an acceptable power waveform. The energy storage device is configured to provide power to the marine vessel to reduce fuel used, emission output, and / or mechanical noise output. A method for providing rechargeable energy onboard a marine vessel is further disclosed.

In a force sensor chip, a base member, to which an external force is applied, includes: an operating part provided in a central portion of the base member and having an external-force acting area section; a supporting part provided, in an outer peripheral portion of the base member, for supporting the operating part; an intermediate part provided between the operating part and the supporting part; a first connecting arm section connecting the operating part and the intermediate section; a second connecting arm section connecting the intermediate part and the supporting part; and at least one strain resistance element provided on each of respective deformation-generating portions of the first and the second connecting arm sections.

A combination blower assembly and string trimmer whereby the string trimmer head is easily detachable without the use of any tools. The device includes a blower assembly that further includes an upper and lower housing mated together to form a volute-shaped cavity where an impeller with airfoil-shaped blades reside. The detachable string trimmer head is located under the lower housing of the blower assembly and is easily attached or removed from the blower assembly by a simple push and turn motion. The blower assembly further includes an air inlet and air inlet cover. When the air inlet cover is rotated to a position where the air inlet is open the blower assembly is operable and the string trimmer is inoperable. Furthermore, when the air inlet cover is rotated to a position where the air inlet is closed the blower assembly is inoperable and the string trimmer is operable.

A centrifugal blower apparatus includes a scroll-shaped housing with first and second air inlets which open to a blower chamber that is in fluid communication with an air outlet. The blower includes a motor to drive an impeller, wherein the motor is secured to a frame that is coupled with the housing in a manner to substantially enhance aerodynamic performance of the blower.

A pixel structure comprises a photo-sensitive element for generating charge in response to incident light. A first transfer gate is connected between the photo-sensitive element and a first charge conversion element. A second transfer gate is connected between the photo-sensitive element and a second charge conversion element. An output stage outputs a first value related to charge at the first charge conversion element and outputs a second value related to charge at the second charge conversion element. A controller controls operation of the pixel structures and causes a pixel structure. The controller causes the pixel structure to: acquire charges on the photo-sensitive element during an exposure period; transfer a first portion of the charges acquired during the exposure period from the photo-sensitive element to the first charge conversion element via the first transfer gate; and transfer a second portion of the charges acquired during the exposure period from the photo-sensitive element to the second charge conversion element via the second transfer gate.

The present invention provides a method of measuring a physical quantity using a vibrator. The vibrator has a plurality of driving vibration arms, a plurality of detection vibration arms, films for adjusting a weight provided on the driving vibration arms, and detecting electrodes provided on the detection vibration arms. A driving vibration is excited in the vibrator, and output signals are output from the detecting means based on a detection vibration excited in the vibrator responsive to the physical quantity. The weight of each of the films is adjusted based on a comparison of the output signals from the detection vibration arms.

A centrifugal fan assembly including a housing having a lower surface and a parallel inlet wall that defines an inlet opening. A shaft is supported by the housing for rotating about an axis. A plurality of fan blades are disposed about the shaft and extend radially from the axis for drawing air axially into the fan blades and blowing air radially outwardly. The housing defines a scroll wall that spirals about the axis and defines an outlet air passage that extends substantially tangentially to the axis. The fan blades include extensions that extend through the inlet opening and outside of the inlet wall.

The present disclosure relates to a low noise, compact rotary compressor configured to damp noise and vibration generated from internal components. The compressor may include a stator holder coupled to the stator and the pump, providing physical separation between the stator and the casing. The compressor may also include a pump holder coupled to the pump and the casing, providing physical separation between the pump and the casing. Additional damping components may be placed at various coupling points within and around the stator holder and / or pump holder. The suction line connection may also be configured to reduce noise and vibration. Aspects of the present disclosure may be applicable for reducing the noise and vibration in a number of fluid displacement devices and BLDC motors.

A personal audio device includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate the speaker to provide an error signal indicative of the effectiveness of the noise cancellation. A secondary path estimating adaptive filter is used to estimate the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Noise is injected so that the adaptation of the secondary path estimating adaptive filter can be maintained, irrespective of the presence and amplitude of the source audio. The noise is shaped by a noise shaping filter that has a response controlled in conformity with at least one parameter of the secondary path response.