74results about How to "Cancel sound" patented technology

The invention relates to a smart voice processing method and belongs to the technical field of information processing. The smart voice processing method is characterized by achieving smart identification of identities of multiple talkers in the multi-person voice environment and separating mixed voices by building a talker voice model base so as to obtain independent voice of each talker, amplifying voices of the talkers to be heard according to user demands and eliminating voices of talkers not required by the users. Different from the traditional hearing aid, the smart voice processing method can be used for automatically providing needed voices for the users according to user demands, reduces interference of non-target voices except for noise, and has individuation, interaction and intelligentization.

The invention relates to drum leather used for an original sound drum and an electronic drum. The drum leather is formed by superposing a surface layer, a middle layer and a bottom layer together, wherein the surface layer used as a striking face adopts one of a dacron silk screen, a nylon silk screen, a chinlon silk screen and a polyester silk screen; the middle layer with the functions of sound suppression and vibration damping adopts a dacron glue-spraying screen fabric; and the bottom layer used as a supporting layer adopts one of the dacron silk screen, the nylon silk screen, the chinlon silk screen and the polyester silk screen. The drum leather used for the original sound drum and the electronic drum is formed by superposing the three layers of silk screens together. When the drum leather is used on the original sound drum, the middle layer made from a soft material can eliminate sound generated when a drumstick is struck on the surface layer, so that the original sound drum can not disturb residents and is suitable for a drummer to use during practice; and when the drum leather is used on the electronic drum, the middle layer can quickly and effectively attenuate vibration generated when the drumstick is struck on the surface layer, so that the sounding accuracy of the electronic drum can be enhanced, and supporting facilities can also be simplified, thereby lowering the production cost.

A method for operating an electronic device including a first microphone and a second microphone to block the echo generation the electronic device is operated in a loudspeaker mode. The method includes: determining whether a sensor located within a predetermined range from the second microphone has sensed a peripheral object; blocking an operation of the second microphone when the sensor has sensed a peripheral object; and blocking echo generation by eliminating a sound that is output from a speaker and input to the first microphone.

The invention discloses a noise reduction method and a handheld mobile terminal. The method is applied to a first handheld mobile terminal. An answering module is arranged in the first handheld mobile terminal. A first audio playing unit is arranged in the answering module, and the first audio playing unit is used for playing a first voice signal sent by a second handheld mobile terminal when the first handheld mobile terminal communicates with the second handheld mobile terminal. At least one second audio playing unit is arranged on the answering module. The method comprises the following steps: collecting a first related parameter of the first voice signal; generating a second voice signal provided with a second related parameter based on the first related parameter, wherein the second related parameter of the second voice signal is matched with the first related parameter; and outputting the second voice signal through the at least one second audio playing unit to reduce noise of the first voice signal.

A slide block mechanism for a semi-automatic pistol that locks the slide in battery and prevents the slide from reciprocating when the pistol is discharged. The slide block mechanism consists of a pair of aligned notches formed in the bottom edge of the slide and the top of the frame, and a pivoting slide block lever mounted to the frame that selectively seats within either of the aligned notches. The slide block lever can be manually switched to engage and disengage the slide block mechanism and is independent of the fire control and slide stop assemblies. The slide block lever has a protrusion that seats within the slide notch when engaged to prevent the slide from moving rearward and seats within the frame notch when disengaged for allowing normal operation of the slide.

The invention discloses a building intelligent ventilation system based on the Internet of Things, which includes a ventilation control system and a ventilation pipeline system. The ventilation control system includes a monitoring unit, a main control unit, a power supply unit, an execution unit, a wireless communication unit and a network monitoring center. In view of the problems that the current building ventilation system cannot be automatically ventilated, the noise generated by ventilation and the good air quality are guaranteed, the automatic control system controls the ventilation and temperature adjustment, the setting of the noise elimination device and the setting of the air filter device to realize intelligent adjustment of the indoor environment of the building and Ability to remotely monitor the ventilation system.

The invention belongs to the technical field of preparation products for daily appliances, and particularly relates to an effective toilet-cleaning foam aerosol and a preparation method thereof. The foam aerosol comprises, by weight, 8-18% of a propellant, 5-10% of a foaming agent, 2-8% of a deodorizing agent, 0.1-0.6% of a thickener, 0.3-0.6% of natural bio-antimicrobial agents, 0.2-0.4% of preservatives, 0.2-0.4% of essences, and 62-84.2% of deionized water. The effective toilet-cleaning foam aerosol has the advantages of effectively removing and isolating foul smell, having fine and rich foams, keeping stable for a long time, resisting to water splashing, cleaning toilets with toilet paper saved, being environmental friendly and water saving and the like.

A stick type drum stick is disclosed which includes drum stick design featuring a hole drilled longitudinally in the playing striking end. The primary purpose is to accommodate a rod. The rod is inserted and glued into the hole of the tip. The rod can be cut to a desired length to suit its flex and resilient nature. Suitable material for the rod include nylon or delrin, PVC, ABS, polypropylene or polycarbonate. The result of combining these materials in this format produces a filter tip drum stick.

The invention provides a noise-elimination damping rail joint with staggered gaps connected by tenon, which is characterized in that the rail joints of the invention are connected by tenons which have different shapes and are coincident to each other; therefore, transverse broken gap of the rail joint is staggered, and the joints of two rails are mutually coincident alternatively; the wheel can pass through the joint without gap and generates no strike vibration and noise between the wheel and the rail joint gap, thus improving the comfortableness of the passenger and eliminating the harmful effect of the vibration and noise on the environment when the train passes; the rail joint with staggered gaps connected by tenon is safer, more reasonable and more stable compared with the existing butted rail joint, creates beneficial conditions for the speed-increasing of the train and is a technical breakthrough in the rail history.

The invention discloses a ceiling type indoor air purifier. The air purifier structurally comprises an LED lamp, an air outlet, a display screen, a telescopic rod, a connecting plate, a noise reduction device, a sweeping device, a primary filter screen, an HEPA efficient filter screen, an activated carbon filter screen and a machine body. According to the invention, when purification is carried out after improvement, vibration generated by air purification is reduced through cooperation of the protection damping blocks and the damping springs, most of generated noise is efficiently blocked through the silencing net plate and the sound insulation net plate auxiliary silencing cover, sound generated by operation of the air purifier is eliminated, and the use effect of the air purifier is improved; after air is purified, the brush is driven by the sliding block to rotate, dust particles on the filter screen are swept, then the dust suction piece is used in cooperation with blades for dustsuction treatment, swept dust is sucked into a dust collection cavity through a connector, dust in the air purifier is removed, and the practicability of the air purifier is improved.

Being in use for a device of picking up digital image, the method eliminates sound of motor rotation when video recording carries through. The method includes following steps: inputting analog control signal; simulating working order of motor, and marking down analog sound waveform (ASW) of motor; establishing data bank of ASW; when video recording carries through, the device of picking up digital image uses ASW to eliminate sound of motor in dynamic film.

Disclosed is a telephone headset that features an antiphase/anti-noise speaker within an anechoic chamber so that noises provided therein can be combatted with antiphase noises. In some embodiment, the antiphase/anti-noise speaker can be an exciter. In some embodiments, the headset is designed to include passive and active noise cancelation of a use's voice. Suitably, the headset can be adjusted to fit an inclusive range of head dimensions comfortably, the headsets may connect wirelessly to the user's phone to ensure cable free operation and communication.

The invention discloses a contraction folding ladder, which comprises a fixed frame, a connecting frame and a movable frame, wherein the fixed frame is fixedly arranged on a fixed object and comprises two fixing rods in parallel arrangement; the connecting frame is movably connected with the fixed frame; the movable frame comprises support rods and telescopic rods connected with the support rods through telescopic elements; the support rods and the fixing rods are in one-to-one corresponding arrangement and are movably connected; the telescopic rods are movably connected with the connecting frame through a chain via a pedal; when the contraction folding ladder is in an unfolded state, the end parts of the support rods are flushed with the end parts of the fixing rods, or are higher than the end parts of the fixing rods. The contraction folding ladder has the advantages that the fixed frame is fixedly arranged on a bed frame of a student dormitory; the rest influencing sound given when people get on or get off from a bed and the swinging generated in the process can be eliminated; a certain degree of potential safety hazards is greatly reduced; the ladder can be contracted and folded; the occupied space is reduced; the placement is convenient.

An electrically heated wooden floor, include a floor body, the two ends of the floor main body are respectively provided with matching tongue and tongue groove, a heating layer is arranged inside thefloor body, The heating layer is provided with a hollow groove, a plurality of vertical isolation ribs are arranged in the hollow groove, reinforcing ribs are arranged crosswise between adjacent isolation ribs, a threading pipe is arranged at the crosswise part of the reinforcing ribs, a carbon fiber heating wire is arranged in the threading pipe, the carbon fiber heating wire is centrally connected with an external temperature controller through a cold lead, and a power supply wire is connected on the temperature controller. The invention has the characteristics of good heating effect, convenient installation, maintenance and good comfort.

The semicircle bearing bush finely boring machine inevitably generates lots of iron scrap in an operating process. The conventional equipment without a collecting device exerts bad influences on the cleanness and tidiness of working places, and the iron scrap falling onto the ground cannot be collected conveniently. The invention aims to provide an iron scrap collecting device for a semicircle bearing bush finely boring machine, which can collect iron scrap generated during the operation of the semicircle bearing bush finely boring machine in a centralized manner and prevent the iron scrap from falling onto the group, thereby avoiding affecting working environments and inconvenience of collecting iron scrap manually.

The invention discloses a micro silent touch switch. The micro silent touch switch comprises a hollow shell; a switch cap is arranged at one end of the shell; the switch cap is connected to a middle shaft; the middle shaft is arranged in a switch circuit board in a penetration manner; the middle shaft is also sleeved with a switch contact piece; a first elastic part is arranged between the switch contact piece and the switch cap; the other end part of the middle shaft is connected to a second elastic part, wherein a conductive contact piece corresponding to the switch contact piece is arranged on the switch circuit board; when the switch cap presses downwardly due to stress, the first elastic part pushes the switch contact piece to move downwards to be in contact with the conductive contact piece to turn on the switch, and to compress the second elastic part at the same time; and when external force is removed, the second elastic part recovers elasticity deformation to reset the switch contact piece to disconnect the switch. By virtue of the micro silent touch switch, through matching of two springs and the middle shaft, the switch movement journey is prolonged; and meanwhile, the switch operating sound is eliminated, the switch can be longer in service life, and the self structure of the switch is relatively simple.

The invention is applicable to the technical field of vehicle gear shift devices, and discloses a monostable electronic gear shift device and a vehicle having the gear shift device. The monostable electronic gear shift device comprises a shift lever component, a shell component, a gear block component and a gear signal sensing component; the shift lever component comprises a shift lever rotatablyconnected to the shell component; the gear block component is arranged inside a shell; the gear block component is provided with a steady-state position and a transient position; the gear signal sensing component is respectively connected to the shift lever component and the shell component; the gear block component comprises a silencing guide structure; and the lower end of the shift lever component abuts against the silencing guide structure. The vehicle has the above monostable electronic gear shift device. According to the monostable electronic gear shift device and the vehicle having thegear shift device provided by the invention, by simplifying the structural arrangement of a shifter, the size of parts can be miniaturized, the number of the parts is reduced, the feasibility of quality control is improved, and the user experience is good.

The invention provides a water-storage and sound-reducing PVC laminated board. The water-storage and sound-reducing PVC laminated board is provided with a water storage layer, a sound-reducing layer, a waterproof coating layer, a fireproof coating layer, a first PVC laminated board and a second PVC laminated board in sequence from top to bottom. The water-storage and sound-reducing PVC laminated board provided by the invention has the fireproof function, also can be used for storing water for reducing the temperature, has the sound-reducing and moisture-proof functions and can be repeatedly used.

The invention provides a terminal, an audio signal processing method, an audio signal processing device, audio signal processing equipment and a storage medium, the terminal comprises a terminal bodyand at least two receivers, the terminal body comprises a screen side and a non-screen side, the non-screen side is provided with at least two first sound outlet holes, and the at least two first sound outlet holes are located on different surfaces of the non-screen side; each receiver is provided with a second sound outlet hole. Wherein the at least one second sound outlet hole corresponds to atleast one first sound outlet hole in the first surface of the non-screen side, the at least one second sound outlet hole corresponds to at least one first sound outlet hole in the second surface of the non-screen side, the second surface is different from the first surface, and the phases of the audio signals in the receivers are different. By means of the technical scheme, the receiver can be installed on the non-screen side of the terminal, the screen space of the terminal is not occupied, meanwhile, directivity control over sound wave radiation can be achieved at the first sound outlet holeof the terminal, and the call problem of the full-screen terminal is solved.

Disclosed is a telephone headset that features an antiphase/anti-noise speaker within an anechoic chamber so that noises provided therein can be combatted with antiphase noises. In some embodiment, the antiphase/anti-noise speaker can be an exciter. In some embodiments, the headset is designed to include passive and active noise cancelation of a use's voice. Suitably, the headset can be adjusted to fit an inclusive range of head dimensions comfortably, the headsets may connect wirelessly to the user's phone to ensure cable free operation and communication.