502 results about "Impact noise" patented technology

A method for controlling operational sequencing of gears in an automatic transmission (102) which has been built in an auxiliary mode. In the case of such a shifting transmission it is possible that during the engagement of its transmission gear stage, impact noises or contact noises are present in the shifting procedure. This can occur by the generation of a tooth-on-tooth positioning between the toothing of a sliding collar (126) and the come-along toothing of an idler gear (130, 132). Provision is made for the control of the activation movement of the sliding collar (126) carried out in such a manner that an activation condition impact of the transmission parts, which are partakers in the shifting associated transmission part onto other transmission parts with the least possible impact force and/or with a least possible impact noise level.

A dryer uses a high-speed blower producing high velocity air, a heater and a compound directional nozzle containing multiple tubular, cylindrical air sub-outlets to generate both suitable force and temperature in the sub-jets of air to dry the user's hands. The air outlets are sized and shaped to maintain direction of airflow at the location of the hands. The multiple tubular sub-nozzles reduce the air turbulence noise from the fast airflow sub-jets striking the hands by providing spaces between the adjacent sub-nozzles and air sub-jets so that the turbulence and hand impact noise is reduced and so that the water evaporated from the water film has a shorter escape distance. An ion source provides ions in the output air from the compound directional nozzle to enhance evaporation.

A computer based bird control system is provided. The bird control system utilizes an impactor that is attachable to a structure, such as an I-beam or other similarly sized and dimensioned metal object, to create an acoustic impact noise similar to a whacking of the structure. The impactor is preferably actuated at a random or a semi-random impact rate such as around once every ten seconds. The acoustic impact noise may be provided in addition to the playing of bird predator or other deterrent sounds maintained in audio files on the computer. The system also provides audio and/or physical bird presence detection within a monitored area. Detection of the presence of a bird may be used as a trigger for the actuation of the impactor and/or predator/deterrent sounds. Actuation of the impactor and/or sound files may be accomplished via a schedule through the use of timer files in addition to or in place of animal presence detection. A graphical user interface of the system provides user control of the system including the ability to set and/or modify system parameters such as those that can detect particular bird species via audio detection, as well as the manipulation of timer file parameters for automatic or forced activation of the impactor and/or sound files.

The invention provides a control method and system of a variable refrigerant flow (VRF) air conditioner. The VRF air conditioner comprises an outdoor unit and a plurality of indoor units. An electronic expansion valve is mounted in each indoor unit. The control method includes: when an instruction for turning off all the indoor units of the VRF air conditioner is received, controlling the compressor of the outdoor unit to stop operation, and controlling an optional number of electronic expansion valves in all the indoor units to keep a preset openness; detecting the difference of high pressure and low pressure in the compressor, and/or recording the duration of operation stopping; when the detected pressure difference is smaller than or equal to a preset pressure value and/or the duration of operation stopping reaches preset duration, controlling the four-way valve in the outdoor unit to deenergize. By the control method, when all the indoor units of the VRF air conditioner are turned off, air flow impact noise can be avoided while air conditioner energy consumption can be lowered under the premise that the difference of the high pressure and the low pressure in the compressor is balanced.

In an electromagnet switch, a stationary iron core is composed mainly of a base part and a disk part. The base part is faced to a plunger and the disk part is forcedly inserted and fixed to a boss part formed in the base part. The disk part is composed of a metal plate of ferromagnetic substance (iron plate) and another substance plate (made of resin or rubber and the like, for example,) of a smaller spring constant or a larger damping coefficient than that of the metal plate. The metal plate and another substance plate are laminated. Another substance plate absorbs or reduces the impact force when the plunger is electromagnetically attracted toward and collides with the base part. The propagation of a large impact noise or crashing sound is thereby suppressed, and as a result the impact noise can be reduced.

A noise-reducing substrate for use in a flooring system, the flooring system having a subfloor and a decorative upper layer. The substrate comprises a series of edge butted panels, each of which has a bottom surface, a top surface and side surfaces. Each panel's top surface and oppositely facing bottom surface are parallel to each other and are spaced apart by the thickness of the substrate. A profile in the bottom surface of the substrate changes the substrate's effective stiffness and improves the noise isolation of the substrate compared to the stiffness and noise isolation of the panel without the profile. Additionally, the profile reduces the weight of the panel, thereby reducing manufacturing and installation costs. When the substrate is positioned between the subfloor and the decorative top layer, the material hardness and the flat profile of the upper surface provide a platform with the strength and texture required to allow for installation of the decorative floor layer without the need for an additional rigid backing material. Such a system greatly improves the impact noise reduction on a variety of floor/ceiling systems while keeping the installation cost low and the adding very little to the total system thickness.

A low release effort eccentric double ratchet, double pawl vehicle latch includes a ratchet, a primary pawl, an auxiliary ratchet and a secondary pawl. A drive mechanism including a gear cam wheel sequences movement of the secondary pawl to open and reset the latch. Upon reset, the drive mechanism actuates the auxiliary ratchet back to a closed state in a soft manner without using a hard stop; instead the latch has a cushioning spring that is used to softly stop the gear train during the reset absorbing motor energy and thus eliminating impact noise.

The invention aims to provide a method for tracking multiple moving targets under an impact noise environment. The method includes setting a special nonuniform-linear-array array structure; locking the targets within a changing search range; designing a quantum culture wild-goose-group method; utilizing a search mechanism of the quantum culture wild-goose-group method to search an optimal angle value of an extended and weighted signal maximum likelihood equation in the search range. By gradually narrowing the search range and applying the intelligent search mechanism, the calculating quantity problem of a search method is solved. Simulation results show that by the method, instantaneity of a designed method can be guaranteed; the method has array expanding capability and high tracking accuracy, and still has good performance under severe noise environments with strong impact noise.

Provided is a cable or the like protection and guide device, which can suppress the sliding contact noise by reliably limiting a linear position and a bending position exhibited during the movement of the cable or the like, and at the same time, which can reduce a setting space by suppressing the impact noise and wear of a connecting pin piece on a connecting pin hole even if the height size of the link body is decreased. A connecting pin piece, convexly provided on a link body, which forms a cable or the like protection and guide device, includes stopper surfaces, which are parallel to the upper edge center portion and the lower edge center portion of the side plates and are oppositely disposed across a bending center point and a pair of front, and rear arc-shaped outer circumferential surfaces, which are oppositely disposed across the bending center point. Further a connecting pin hole, concavely provided in said link body, includes a pair of linear position maintaining surfaces, which are parallel to the upper edge center portion and the lower edge center portion of the side plate, and are oppositely disposed across the bending center point, bending position limiting surfaces, which are oppositely disposed across the bending center point in a plane symmetry, and a pair of arc-shaped inner circumferential surfaces oppositely disposed across said bending center point in a plane symmetry to be brought into sliding contact with said connecting pin pieces.

The fuel cutoff valve has a first valve mechanism inside a first valve chamber of a casing. In the first valve mechanism, a seat member installs on the upper part of a first float. The seat member has a seat portion which seats in a first seal part facing a first connection conduit; and a valve support portion projected from the lower face of the seat portion in the direction of up and down movement of the first float. The valve support portion is formed so as to be in contact against the upper end of a bottom support portion of a lower cover when the first float is in the down position. With a simple configuration, the fuel cutoff valve affords reduction of impact noise associated with vibration of the float.

A normally closed electromagnetic valve is closed again after temporarily being opened during an abnormality check of the valve. When the valve is opened, electricity is supplied so that a plunger is moved by a coil but a back face of the plunger does not abut against a receiving face of a fixed portion. Because the plunger does not strike the fixed portion, no impact noise is generated. Also, when the valve is closed, the electricity is not instantly dropped to zero, but is gradually reduced. As a result, impact noise when the valve strikes the valve seat is able to be reduced.

The invention provides an open-close body control apparatus. The open-close body can be thus fully closed reliably and impact noise generated by fully closing the open-close body can be suppressed with no conventional duty control. A motor (9) is driven to rotate in a closing direction in an ordinary region (Zn) other than a full close position immediately ahead region (Zc). An interposition determination unit (2f) determines whether or not interposition occurs while a windowpane (7) is closing. If the interposition determination unit determines that interposition occurs, the motor (9) is driven in a reverse direction to open the windowpane (7) by a predetermined amount. The interposition determination unit (2f) continuously determines interposition after the closing windowpane (7) enters the full close position immediately ahead region (Zc). If the determination unit determines that the interposition occurs while the windowpane (7) is closing in the full close position immediately ahead region (Zc), the control unit stops driving the motor (9) to stop the windowpane (7).

The invention relates to a storey noise control structure and a method for constructing the same. The interlayer noise control structure is used for controlling direct vibration noise transferred among slabs of the storeys of an apartment, preventing and absorbing indirect resonance noise in vibration and impact noise transmitting systems among the storeys of the apartment. The interlayer noise control structure comprises a noise absorption floor, grid-shaped anti-vibration components, moisture-proof components, rubber sheets, a spongy sheet and a second horny comb sheet; the noise absorption floor is formed by rubber components clung to slabs; the grid-shaped anti-vibration components are arranged on the noise absorption floor to form preset curved noise source channels; the rubber sheets are overlapped on the moisture-proof components; the spongy sheets are overlapped on the rubber sheets; the second horny comb sheets are overlapped on the spongy sheets and used for filling cement mortar or butter in the case that floor heat supply pipelines are provided; non-woven fabrics are stuck to the upper surfaces and the lower surfaces of the moisture-proof components, and first horny comb sheets containing vermiculite are integrated in the middle parts of the moisture-proof components; silver foil sheets are stuck to the bottom surfaces of the second horny comb sheets; and top floor materials are stuck to the top surfaces of the second horny comb sheets.

The invention discloses a noise detection method and a device, belonging to the network communication field. The noise detection method comprises steps of detecting whether a current voice frame comprises short time impact noise through at least two detection modes, wherein the at least two detection modes are two of a time domain detection mode, a frequency domain detection mode and a mode recognition detection mode, and recording noise detection result corresponding to the current voice frame when the fact that the current voice frame comprises short time impact noise is detected. The invention solves the problem that using only time domain energy analysis method to analyze the short time impact noise is high in false drop rate because the analysis capability on the short time impact noise by the time domain energy analysis is poor, and the invention achieves the accuracy of the improving noise detection result.

An outer race support plate to which torque of a pinion gear is transmitted from a ring gear via a one-way clutch and thus rotates a crankshaft is provided separately from a flywheel and is mounted to the crankshaft not via the flywheel. As a result, impact noise produced when the one-way clutch engages is not directly transmitted to the flywheel. Accordingly, noise radiation from the flywheel can be suppressed, thereby enabling noise to be reduced.

A passive level dependent hearing protection device for insertion into an ear canal is made of a flexible bladder attached to a frame and where the bladder utilizes valves to evacuate air from the ear canal. The device thereby causes transmission loss of acoustic waves wherein low frequency steady state and impact noises are attenuated but soft noises such as speech are attenuated to a lesser degree. The device incorporates a safety feature for preventing creation of too low an air pressure in the ear canal. Finally, the device may incorporate a transducer.

The invention relates to the technical field of distributors for cooling and air conditioners, in particular to a distributor internally provided with a jet flow hole plate. A center jet flow hole plate and a Venturi distributor are adopted for an existing distributor for cooling and air conditioners for jet distribution. According to the center jet flow hole plate, equalization of the refrigerant flow distributed to each branch is poor; in a non-vertical installation state, heat exchange efficiency becomes poorer; and the flowing speed of a refrigerant is sharply increased, and the distributor generates high liquid impact noise. According to the Venturi distributor, the molded line processing cost of an internal flowing channel is high; in a non-vertical installation state, the refrigerant deviated flow influence caused by refrigerant gravity also exists; and the axial size is large. A main body of the distributor internally provided with the jet flow hole plate is provided with an inlet end and an outlet end, an inner cavity in the outlet end of the main body is provided with the jet flow hole plate, and the jet flow hole plate is provided with a plurality of punching narrow seams and flow guide blades. By means of the distributor, the heat exchange effect of a whole air conditioner system is obviously improved, noise is greatly lowered, the production cost is lowered, and the distributor can be installed in any direction.

The invention discloses a slow descent pipeline, and belongs to the technical field of conveying devices. The slow descent pipeline aims to solve the problem that material will impact the lower side of a vertical section and the lower side of an inclined section when falling off to cause abrasion of a pipe fitting. The slow descent pipeline comprises the vertical section and the inclined section which is connected to the lower portion of the vertical section, a plurality of inclined baffles are arranged in the vertical section in the longitudinal direction, and every two inclined baffles penetrate through each other. According to the slow descent pipeline, the inclined baffles are arranged in a staggered mode to form a zigzag curve flowing channel. When the slow descent pipeline works, the material enters the vertical section from the upper portion, makes contact with the inclined baffle on the upper portion, reverses, descends step by step after being buffered, and is conveyed to other areas from the inclined section. Compared with the prior art, the inclined baffles of the slow descent pipeline have a slow descent effect on material flow, abrasion to the pipe fitting from the fallen material can be effectively slowed down, service live of the pipeline is prolonged, and meanwhile impact noise can also be reduced.

A buckle device capable of reducing an impact noise generated when a tongue plate (2) is inserted and eliminating a coil spring member energizing a release button (50) and a lock pin holder so as to simplify a structure, wherein a lock bar (30) has both end parts inserted into slots (16) and is mounted on a pair of side plate parts (12), both end parts of the lock bar (30) are engaged with a pair of guide grooves (54) in a pair of guide wall parts (52) of a synthetic resin release button (50) and, when the tongue plate (2) is inserted, the lock bar (30) is moved rapidly to the front end part of the slots (16) and, in this case, the end parts of the lock bar (30) are supported on a supporting part (55) at the end of the guide groove (54), not on the end of the slots (16).