72results about How to "Lower the decibel" patented technology

A noise reduction system for significantly reducing the noise generated by an air turbine used to create suction for automatic cutting tables. The system employs one or more baffles mounted within a closed main housing including noise reduction foam and an exhaust housing lined with noise reduction foam mounted around the baffle exhaust. The direction of the exhaust air is changed 180 degrees and is utilized for cooling the air turbine and electric motor.

The invention provides a device for monitoring the alarm sound of other motor vehicles in the cab of a motor vehicle. The device mainly comprises sound collectors, a signal processing unit, an alarm display screen and a voice alarm loudspeaker. Based on the characteristics that the alarm sound signal of a vehicle has fixed spectral range on the frequency domain and is periodic on the time domain, the method comprising the steps of filtering the signal and further carrying out the related detection can effectively judge whether the signal is generated from the alarm sound of the vehicle and judge the direction of the sound source of the alarm sound by two or more than two sound collectors 1 mounted at the periphery of the vehicle; and a driver can be given an alarm by the alarm display screen 9 and the voice alarm loudspeaker 3, so that the driver can learn about the driving direction of other vehicles under the circumstance that the window of the vehicle is closed, the noise from the vehicle per se or the ambient noise is very loud, or the alarm sound of other vehicles is small. Accordingly, the device of the invention can prevent traffic accidents, reduce the noise of the loudspeaker and further reduce the noise pollution at the same time.

The invention can let car driver clearly hear the trumpet sound of other vehicles. It comprises: a sound pick-up, a signal processor and a speaker. On the four corners of car case, respectively mounts a sound pick-up connected to the signal processor of the car; the signal processor is formed by connecting signal amplifier to connect a A / D converter in series, and connecting the A / D converter to a multi-path filter in series, and then connecting a D / A converter, an amplifier to speaker.

The invention relates to a muting device for cymbals, comprising at least one magnetic rubber sheet and vibration sensors. Each magnetic rubber sheet comprises an upper sheet and a lower sheet, and a cymbal receptacle is formed between the upper sheet and the lower sheet; the upper sheet and the lower sheet attract each other; one vibration sensor is embedded in the lower end face of the upper sheet. The muting device has the advantages that the cymbal is combined with the vibration sensors and a data processing terminal, forming an electronic musical instrument; the cymbal is directly sleeved with the muting device for use, demounting parts of the cymbal is not required, convenience and high speed are brought, and resonance of the cymbal is effectively prevented.

The invention discloses a sound-proof and noise-reduction pillow. The pillow comprises a pillow body. A fluffy body for filtering out noise is placed in the pillow body. An audio processing device capable of emitting sound waves to offset the filtered noise is also arranged in the pillow body. According to the pillow, a combined noise reduction mechanism integrating active noise reduction and passive noise reduction is formed. The actual noise undergoes mitigation in decibels after the active noise reduction. The pillow combines the active noise reduction technology and the passive noise reduction technology in a genius and effective manner to attain a good sound-proof effect.

A non-elastic thermoplastic film having a noise abatement region and a fastening component. The noise abatement region has a plurality of apertures, wherein each of the plurality of apertures has an area of between about 4 mm2 to about 75 mm2. The fastening component is disposed within the noise abatement region such that the fastening component is surrounded by the noise abatement elements.

The invention provides an environment-friend energy-saving ventilation sound adsorption window, comprising a window frame (1) mounted with inner and outer glass (13, 3), wherein the outer glass is disposed with an air inlet (4) and the inner glass is disposed with an air outlet (11). The invention is characterized in that the air inlet (4) is disposed with a wind-guiding blind (5), a noise guiding glass (2) whose one side is connected with the window frame is arranged with the inner and outer glass, while the guiding glass separates the space between the inner and outer glass into a first adsorption room (15) communicated with the air inlet (4) and a second adsorption room (16) communicated with the air outlet (11), for guiding the outdoor air and noise into the first adsorption room (15), while the first and second adsorption rooms (15, 16) are communicated via an air let (17). The inventive window can guide air and noise directly into the first adsorption room to be absorbed by two stages to enter into room, with high effect. The wind-guiding blind is adjustable which can adjust the wind direction and flux.

The invention provides a guide vane for an aeroacoustic wind tunnel. The guide vane is of a streamline shape and comprises a streamline frame and a fluid sound absorption filler, the streamline frameis filled with the fluid sound absorption filler, and the external line shape of the fluid sound absorption filler is matched with the appearance of the guide vane. The streamline frame of the guide vane is filled with the fluid sound absorption filler, so that low resistance and uniformity of airflow steering can be ensured, the turbulent flow is reduced, the effects of noise elimination and reduction are achieved, the decibel of background noise of an experiment module is reduced, and therefore it is ensured that higher-quality and more accurate data are tested when a wind tunnel runs.

The invention provides an automatic cutting device for aluminum profiles, and relates to the field of aluminum material machining. The automatic cutting device for the aluminum profiles comprises a base, bottom feet are fixedly installed at the bottom of the base, the top of the base is welded to the bottom of an electric-hydraulic push rod, the top of the electric-hydraulic push rod is welded tothe bottom of a top frame plate, and a cutting blade is arranged below the top frame plate. The automatic cutting device for the aluminum profiles is provided with two clamps which are close to each other to clamp and fix the aluminum profiles; when clamp blocks make contact with the aluminum profiles, a moving plate drives an inserting rod to continue to move close to the aluminum profiles, checkblocks make contact with clamp jaws to achieve clamp towards the aluminum profiles, the aluminum profiles are subjected to contact of six faces, and clamping and fixing effects are better; a tensionspring is arranged to pull the two clamp jaws to be away from each other, the clamp jaws are opened when the inserting rod is away from the clamp jaws, and next machining is facilitated; and a fragment-proof protection cover is arranged, the problem that fragments produced during cutting splash to injure working staff is avoided, and the working staff are effectively protected.

The invention discloses a high-speed drilling machine with a noise lowering function. The high-speed drilling machine comprise a drilling machine body, the right side of the bottom of the drilling machine body is fixedly connected with a stand column, the bottom of the stand column is fixedly connected with a base, and the top of the drilling machine body is fixedly connected with a transmission mechanism. The right side of the drilling machine body is fixedly connected with a driving motor, an output shaft of the driving motor is fixedly connected with a driving rotary shaft, the top end of the driving rotary shaft penetrates through the transmission mechanism and extends into the transmission mechanism, and the left side of the drilling machine body is fixedly connected with a silencer.According to the high-speed drilling machine, by arranging the base and the silencer, the noise lowering function is achieved, sounds caused by drill bit transmission shaft rotation are subjected to noise lowering through the silencer, vibration between a machined workpiece and the drilling machine is subjected to noise lowering through a damping device in the base when the drilling machine is used, it is avoided that hearing of a worker is damaged by noise pollution damage, health of the worker is guaranteed, and the fame and benefits of factories are guaranteed.

The invention relates to the technical field of noise reduction equipment, and specifically relates to a smart home indoor noise reduction device. The smart home indoor noise reduction device comprises a wall, a window, fixed plates, a noise reduction device, a fan, a first ventilation pipe, first air inlet holes, a first sound absorbing chamber, a second sound absorbing chamber, a third sound absorbing chamber, a fourth sound absorbing chamber, a humidity sensor, a controller, a humidifier, dehumidifier, a second ventilation pipe, first air outlet holes, a sound insulation plate, an air purifier, a sealing rubber pad, a third ventilation pipe, second air inlet holes, an electromagnetic valve, a fourth ventilation pipe and second air outlet holes, and is characterized in that the wall is provided with the window, the fixed plates are arranged on the indoor wall, the two fixed plates are respectively arranged above and below the window, and each fixed plate is provided with a sliding slot. The smart home indoor noise reduction device is easy to install and remove, and has excellent noise reduction processing for the outdoor noise. Meanwhile, the smart home indoor noise reduction device has the functions of air purification, humidification and dehumidification, is diversified in function, greatly meets requirements of people for the functions of the device and has very high practicability.

An improved muffler diffuser insert adapted to be used with, and mounted within, an exhaust muffler for effectively helping to reduce noise and back pressure attendant to engine operation. The diffuser comprises a cap end for abutting against an exhaust end of the muffler when the muffler diffuser is mounted within the muffler, which has at least one exhaust opening defined therein for cooperation with the exhaust end of the muffler so as to permit an exhaust flow from the exhaust end of the muffler to pass through. A body portion is connected to the cap end, and defines therein an elongated opening for permitting the exhaust flow from the muffler to pass through. A distal end of the body portion comprises an outermost end and two sound deflection portions positioned on either side of the outermost end for use in deflecting sound waves contained in the exhaust flow so as to enhance noise diffusion.

The invention discloses a noise reduction box-type transformer substation which comprises a bottom plate. A protection plate is fixed to one side of an upper end of the bottom plate, baffles are hinged to two sides of the protection plate, a cover plate is hinged to one side of each baffle, an adjusting mechanism is arranged on each baffle, and each adjusting mechanism corresponds to the protection plate and the cover plate. In the invention, a vibration amplitude of a machine body can be well relieved so that collision of parts in the machine body is reduced, a noise generated during operation of the machine body is favorably reduced; and meanwhile, a sound insulation material is attached to an inner portion of the equipment so that the noise can be further reduced, fan blades can rotatewhen the machine body vibrates, the fan blades can be matched with a cooling fan to enable air in the equipment to flow, a temperature of the equipment can be reduced, quality of the air in the equipment can be well guaranteed, impurities and dust are prevented from entering the equipment, workers can check, overhaul and clean the machine body conveniently, and a service life of the machine body can be prolonged.

The invention relates to the technical field of plate processing, and discloses a surface gluing device for plate machining. The surface gluing device comprises a base and four support columns, wherein the four corners of the top of the base are fixedly provided with fixing seats, through holes are formed in the tops of the fixing seats, the bottom ends of the four support columns extend to the insides of the four fixing seats, the inner top wall of each fixing seat is fixedly provided with two sliding slots, the left and right inner walls of each fixing seat are fixedly provided with two first springs, a sliding plate is fixedly mounted between the other ends of every two corresponding first springs, the top ends of the sliding plates are slidably clamped inside the sliding slots, and thebottoms of the sliding plates are fixedly provided with pulleys. The surface gluing device solves the problem that an existing plywood gluing device is uneven in gluing and coating, consequently thequality of plywood is poor after the plywood is handed over a completed project, noise generated by work affects the mental state of a worker, and high-quality gluing on plates with different thicknesses cannot be efficiently carried out.

The invention discloses thermochromic laminated glass and a processing technology thereof. A formula of the thermochromic laminated glass contains a glass substrate, a polymer intermediate layer, titanium dioxide powder, vanadium dioxide powder, a plasticizer, a coupling agent, organosilicone polymer modified polyethylene, a noise-absorbing material, iron oxide powder, copper oxide powder and nickel oxide powder, and the processing technology of the thermochromic laminated glass is further included. A thermochromic glue sheet is prepared through fusion of the polymer intermediate layer, the titanium dioxide powder, the vanadium dioxide powder, the plasticizer, the coupling agent, the organosilicone polymer modified polyethylene, the noise-absorbing material, the iron oxide powder, the copper oxide powder and the nickel oxide powder, then the thermochromic glue sheet and the glass substrate are treated through a high temperature and high pressure technology, thus the thermochromic laminated glass is prepared, the basic structure of laminated glass in the prior art is not changed, operation is easy, the thermochromic laminated glass has no harm to a human body, the high-temperature resistance and low-temperature resistance characteristics are improved to a great extent, the mechanical properties and chemical properties are improved, noise is reduced, the light transmittance of ultraviolet light and infrared light is decreased, the sleep quality of people is improved, and harm of ultraviolet rays to the human body is prevented.

The invention discloses a sound-proof and noise-reduction pillow. The pillow comprises a pillow body. A fluffy body for filtering out noise is placed in the pillow body. An audio processing device capable of emitting sound waves to offset the filtered noise is also arranged in the pillow body. According to the pillow, a combined noise reduction mechanism integrating active noise reduction and passive noise reduction is formed. The actual noise undergoes mitigation in decibels after the active noise reduction. The pillow combines the active noise reduction technology and the passive noise reduction technology in a genius and effective manner to attain a good sound-proof effect.

Silencing and separation in a cold-air, essential-oil, diffuser apparatus and method pass flow through a channel having comparatively high aspect ratios of length to thickness and width to thickness. Curved, tapered, non-parallel, and quasi random surfaces reduce probability and power of resonant frequencies. Offsetting flow through a channel is followed by impingement against an obstructing surface, redirection elsewhere within a drift (separation) chamber, and exiting through a smaller, and differently oriented exit port. Silencing is improved by changes of cross-sectional area creating high-pass and low pass acoustic filters, changes of direction, and absorption of acoustic energy in fluid-droplet-laden air.

The invention discloses a novel intelligent indoor temperature controller comprising a device body, a signal receiver, a controller and an unmanned control assembly. A cross bar is fixedly connected with the top of the device body; and hanging rings are arranged at the two sides of the cross bar. A temperature sensor is arranged at the surface of the device body; a single-chip microcomputer is arranged inside the device body; a display screen is arranged on the surface of the device body; a loudspeaker and an integrated switch are fixedly connected to the surface of the device body; and a controller is arranged at the right side of the device body. The unmanned control assembly is fixedly connected to the left side of the device body and includes a casing, a collector, a condenser microphone and a sound level meter. According to the novel intelligent indoor temperature controller, the unmanned control assembly is arranged and the integrated switch is connected, so that electrical appliances like an air conditioner, an electric heating device and the like are controlled. The novel intelligent indoor temperature controller has advantages of simple structure and high intelligent level.

The invention discloses a low-noise ball grinder which comprises a discharging opening. One end of the discharging opening is fixedly connected with an enclosure. The upper portion of one end, far away from the discharging opening, of the enclosure is fixedly connected with feeding openings. A motor is arranged on the side face, far away from the discharging opening, of the enclosure. The motor is arranged below the feeding openings. A rotor of the motor is connected with a rotating shaft. The rotating shaft stretches into the axis of the enclosure and extends to the other end of the enclosure. A support is arranged on the bottom face of the motor. An anti-vibration pad is fixedly connected to the bottom end of the support. The end, far away from the motor, of the rotating shaft is sleeved with a bearing pedestal. Stabilization devices are arranged on the lower side face of the enclosure. A noise reduction and vibration prevention device is adopted in the enclosure. According to the low-noise ball grinder, a novel noise reduction device is adopted, a structural layer is additionally mounted in the enclosure, and therefore the intensity of generated noise is reduced, noise transmission is effectively cut off, and the decibel of the noise is lowered; and a noise reduction shell is additionally mounted on the outer portion of the enclosure, and therefore noise transmission is further stopped.

The invention discloses a portable baby basket for magnetic resonance examination. The basket comprises a basket body, the basket body is composed of an antibacterial layer, a sound absorption and noise reduction layer and a shaping layer from inside to outside, an inflating module is arranged at the upper part of the basket body, the inflation module is arranged between the antibacterial layer and the sound absorption and noise reduction layer, the inflating module is in an inverted U shape, the antibacterial layer in the middle of the basket body is in an arc shape, the radian of the antibacterial layer fits the spine of a baby, a fixing belt is arranged in the middle of the basket body, the antibacterial layer is made of an antibacterial non-woven fabric material, the sound absorption and noise reduction layer is made of a special-shaped sponge material, and the shaping layer is made of a canvas material. During examination, sound blocking is conducted on ears of a baby through theinflating module and the sound absorption and noise reduction layer of the basket body, the decibel of noise during examination of a nuclear magnetic resonance machine is effectively reduced, the comfort degree during examination of the baby is improved, and the nuclear magnetic resonance examination efficiency for the baby is improved.

The invention relates to a perfume smelting furnace for cosmetics. The perfume smelting furnace comprises a shell, a crushing structure, a sieving structure and a smelting cavity. The top of the shellis provided with a feed inlet. The crushing structure is fixedly arranged on the portion, below the feed inlet, in the shell and comprises first supporting plates, rotating rollers and a motor. The first supporting plates are fixedly installed on the portions, located at the two sides of the feed inlet, of the inner top of the shell. The two rotating rollers are rotatably arranged between the twofirst supporting plates through bearings respectively. According to the perfume smelting furnace for the cosmetics, because a first screen, a second screen and a third screen are arranged in a support frame, small-particle perfume can sequentially pass through the first screen, the second screen and the third screen and fall to the bottom of the smelting cavity, the heating area of the perfume isincreased, and the smelting efficiency of the perfume is improved; and a sound insulation material layer is arranged in a metal material layer of the shell, so that noise can be reduced, and workersare protected from noise hazards.

The invention discloses a smoke dedusting silencer which comprises a primary dedusting cavity, a silencing cavity and a purification and dedusting cavity. The upper end of the primary dedusting cavity is provided with an air inlet pipe and a water inlet, and a sewage outlet and a water outlet are formed in the lower end of the primary dedusting cavity. A plurality of layers of dedusting nets are arranged in the primary dedusting cavity. The silencing cavity comprises a first silencing chamber, a second silencing chamber and a third silencing chamber which are sequentially connected, a partition is arranged between every two adjacent silencing chambers, and a ventilation opening is formed in each partition. The purification and dedusting cavity communicates with a third diversion pipe, a purification and dedusting part is arranged in the purification and dedusting cavity, and an exhaust pipe is further arranged on the purification and dedusting cavity. According to the dedusting silencer, the two-stage dedusting cavities are arranged, so that impurities in smoke are effectively purified; the three-stage silencing chambers are arranged, and sound absorption sponges and glass fiber cloth are arranged in the silencing chambers, so that the decibel in the smoke is effectively reduced, and the standard emission of the smoke is realized; and environment pollution is reduced, the physical and psychological health of people is facilitated, the practicability is good, and the smoke dedusting silencer is worthy of being widely popularized.

The invention discloses a permanent magnet electromagnetic needle. The permanent magnet electromagnetic needle comprises a shell and an end cover; an upper positioning plate base is arranged on the top of the interior of the shell; a lower positioning plate base is arranged at the bottom of the interior of the shell; a silicon steel sheet sleeve is arranged between the upper positioning plate baseand the lower positioning plate base; a coil is arranged in the silicon steel sheet sleeve; a limiting sleeve is arranged in the coil; a rotor is arranged in the limiting sleeve; and the rotor comprises a rotor main body, a rotor upper end and a rotor lower end. By virtue of the permanent magnet electromagnetic needle, relative balance can be kept between the rotor and the magnetic field, the matching degree of the coil magnetic field and the rotor magnetic field can be improved, the efficiency problem caused by magnetic leakage is solved, sound decibel is obviously lowered, the service lifeof the whole apparatus is prolonged, and the temperature of the whole apparatus is lowered; and in addition, the electromagnetic leakage part generated by the coil is returned to the coil through thesilicon steel sheet sleeve, and the silicon steel sheet sleeve also generates a partial magnetic effect, so that the circularity of the coil magnetic field is improved, the efficiency of the whole electromagnetic coil is further improved, magnetic noise generated by magnetic leakage is lowered, the whole apparatus can reach the magnetic full strength, and the efficiency can be improved by 10%.

The invention belongs to sound insulation equipment of a mobile power station and particularly discloses a sound insulation shed structure which comprises a detachable skeleton and a detachable sound insulation component erected on a bracket and is characterized in that the skeleton is formed by detachably connecting multiple pipe fittings, wherein the sound insulation component comprises a shed roof, a first sound insulation screen, first side walls and second side walls; the shed roof is fixed at the upper end of the skeleton; the two first side walls are oppositely arranged on the skeleton; a sound insulation door is arranged on at least one first side wall; the first sound insulation screen is fixed between the two first side walls; the two second side walls are oppositely arranged on the skeleton; and a second sound insulation screen capable of introducing and discharging air is arranged on the two second side walls. The sound insulation shed structure disclosed by the invention has the advantages of high integration, modular assembly, high simple economy, fast shifting and transporting and good sound insulation effect.

The invention relates to the field of detergent equipment, in particular to a cyclone separating device used in the detergent manufacturing process. The cyclone separating device comprises a gas reservoir. A gas outlet pipe is arranged on the upper portion of the gas reservoir. An inlet pipe is arranged on the right side of the gas reservoir. An outer barrel is connected to the lower portion of the gas reservoir and internally provided with an inner barrel. A suspension baffle is arranged at the bottom end of the inner barrel. A cone body is connected to the bottom end of the outer barrel. A fixed dust outlet pipe is connected to the cone body. Spiral fins are wound on the inner wall of the gas outlet pipe. The spiral fins are additionally arranged on the outer wall of an inner pipe of the cyclone separating device, the rotation turns of gas containing solid particles can be ensured, decibels are reduced, and the separating efficiency is improved; furthermore, the equipment complication phenomenon due to the fact that a plurality of cyclone separating devices are installed in series can be avoided. Through the structure, the rotation turns of airflow in the cyclone separating device is made to be enough, backmixing of separated gas and solid can be effectively avoided, and therefore the separating efficiency can be further improved, and the application range can be further expanded.

The invention discloses a fan blade mechanism for a garden blower and the garden blower, and relates to the field of garden tools. The fan blade mechanism comprises a hub part and fan blades, wherein the hub part can rotate around a rotating shaft; the fan blades are arranged on the hub part; each fan blade is provided with a leeward side, a windward side, a front edge, a rear edge and a top edge; each leeward side and the corresponding windward side are opposite; each front edge and the corresponding rear edge are opposite to each other; each front edge is located in the air incoming flow direction; each rear edge is located in the air flowing direction relative to the corresponding front edge; each top edge is located at the end away from the hub part; a first transition part of a curved surface which is close to the hub part from each top edge is arranged at the joint of each top edge and the corresponding front edge; the cross section of each first transition part is in an arc shape; and the radius length of the arc-shape of each first transition part ranges from 0.5 mm to 5 mm. According to the fan blade mechanism for the garden blower and the garden blower provided by the invention, noise generated when airflow is separated from vortex can be effectively reduced.

The invention relates to the field of sound devices, in particular to a mask-type sound insulation device. A mask-type sound insulate device includes a mask body, ventilating device and electrical circuit device, A mask body comprise a cover plate, a side baffle plate and a transverse baffle plate, wherein that side baffle plate is rotatably connected with the cover plate, the transverse baffle plate is arranged on the upper and lower side of the cover plate and vertically arranged with the cover plate, a ventilating device is arranged on the outer side of the cover plate and close to the sidebaffle plate, a circuit device is arranged on the inner side of the cover plate, and the circuit device and the ventilating device are respectively arranged on the left and right sides of the cover plate. The invention can effectively reduce the sound decibels generated in the call process, At that same time, the whole device can be disassemble so as to be convenient for the user to carry and use. The invention can prevent the noise generated by the speak when making a phone call from affecting the surrounding crowd, ensure the high quality and fluency of the conversation in the use process,block the sound of the speaker from spreading to the surrounding environment, and also prevent the sound of the surrounding from entering the headset to affect the call quality.

The invention discloses a noise reduction device. The noise reduction device comprises an air duct structure and a plurality of noise reduction parts, an air duct is constructed in the air duct structure and communicates with the exterior, the multiple noise reduction parts are arranged in the air duct in an array mode, in the process that sound waves impact the noise reduction parts or are reflected, sound energy is gradually decreased, and then the decibel of sound is decreased. According to the noise reduction device, the noise reduction parts are arranged in the air duct, so that in the process that the sound waves entering the air duct impact the noise reduction parts or are reflected in the air duct, the sound energy is gradually decreased, then the decibel of the sound is decreased,even the sound energy is gradually decreased to be zero, thus the effect of noise removal in the air duct is achieved, and meanwhile, the noise reduction device is simplified in structure, fast and convenient to mount, low in cost and obvious in noise reduction effect.

The invention discloses a noise-reducing box-type substation, which comprises a base plate, a guard plate is fixed on one side of the upper end of the base plate, both sides of the guard plate are hinged with baffle plates, and one side of the two baffle plates is hinged with a As for the cover plate, an adjustment mechanism is provided on the baffle, and the adjustment mechanism corresponds to the guard plate and the cover plate. The invention can well alleviate the vibration amplitude of the machine body, thereby reducing the collision of the internal parts of the machine body, and helping to reduce the noise generated during the operation of the machine body. It will also make the fan blades rotate, which can cooperate with the heat dissipation fan to make the air in the equipment flow, which helps to reduce the temperature of the equipment, and can also ensure the quality of the air in the equipment, preventing impurities and dust from entering the equipment, and It is convenient for the staff to inspect, overhaul and clean the body, which helps to prolong the service life of the body.