12results about How to "Hearing protection" patented technology

The invention relates to an invisible pickup noise reduction earplug and method, and relates to the technical field of noise reduction, the invisible pickup noise reduction earplug comprises a shell, a noise reduction structure, a power supply structure and an invisible pull-out structure; the shell is matched with an ear canal in appearance and is provided with a mounting hole; the noise reduction structure is arranged in the shell and comprises a sound receiving unit, an ARM processing unit and a sound production unit which are electrically connected in sequence; the power supply structure is electrically connected with the ARM processing unit and is used for supplying power to the noise reduction structure; the invisible pull-out structure is mounted at the mounting hole, the invisible pull-out structure comprises a protruding part, and at least part of the protruding part is arranged outside the shell. The device has the effect of being convenient to take out.

This application provides a voice gain control method, apparatus, voice control device, and storage medium, relating to the field of voice signal processing technology. The method includes: determining a target gain level for the current statistical period based on a first volume parameter of multiple frames of voice signals within a historical statistical period; and adjusting the second volume parameter of each frame of voice signal within the current statistical period based on a second volume parameter and the target gain level. This application can improve the stability of voice signal volume gain control.

The utility model relates to the technical field of protective appliance especially is concerned on a kind of noise reduction goggles, including mirror frame and temple, the both ends of mirror frame are hinged respectively with temple, mirror frame is equipped with goggles lens, temple is equipped with noise reduction pendant, noise reduction pendant is equipped with adjusting mechanism, cotton thread and noise reduction earplug, one end of cotton thread is connected in adjusting mechanism, its other end is connected in noise reduction earplug, adjusting mechanism is installed in temple, and the length of cotton thread is adjusted, to release or retract noise reduction earplug. From the above, the efficient integration of the goggles and the noise reduction earplug is achieved, providing one-key retracting and automatic indexing function, significantly improving user experience and operation convenience, while ensuring the stability and safety of the equipment, suitable for a variety of high-noise scenes, meeting the user's needs in protecting eyes and hearing, also improving the practicability and aesthetics of the product.

The invention discloses an energy-saving and noise-reducing centrifugal machine horizontal rotor which comprises a driving part used for providing a rotating power source; the rotor hub is connected with the driving part to realize centrifugal rotation; the cradle is rotationally arranged on the rotor hub and used for bearing test tubes; the fairing is arranged on the rotor hub and is combined with the cradle to form a disc-shaped structure so as to reduce aerodynamic noise caused by airflow disturbance; a balance weight adjusting mechanism is arranged in the fairing, and structural radiation noise caused by vibration during rotation is reduced by controlling the balance weight adjusting mechanism. The balance weight adjusting mechanism comprises a balance weight block, a sliding supporting assembly in sliding fit with the balance weight block and a driving assembly for driving the balance weight block to move along the sliding supporting assembly, and the position of the balance weight block on the sliding supporting assembly is changed through the driving assembly. According to the centrifugal machine, energy loss during operation of the centrifugal machine is reduced, aerodynamic noise caused by aerodynamic factors is weakened, generation of structural radiation noise is restrained, and the overall noise level is obviously lowered.

The utility model discloses a system and a device for transforming a pressure maintaining loop of an energy accumulator of a hydraulic station of a slitting machine, which belong to the technical field of thin slitting hydraulic pressure, and comprise an oil storage pool, a pressure maintaining loop, a pressure maintaining loop and a pressure maintaining loop, a liquid level controller, a liquid level oil pointer and an air filter are arranged on the oil storage tank; the oil suction branch is provided with a metering pump, a one-way valve, an air bag type energy accumulator and a pressure relay, and the pressure relay is connected with a pressure gauge; the oil return branch is provided with a shell and tube type water cooler, and the shell and tube type water cooler is used for reducing the oil temperature; the pressure maintaining loop system can reduce pressure needed by the pressure maintaining loop system, so that oil temperature and energy consumption are reduced, noise generated by operation of equipment is weakened, production is more environmentally friendly, the working environment of workshop workers is improved, and physical health and hearing of the workers are protected.

The line drawing machine comprises a bottom plate and a hot melting tank, a battery bin is fixed to one side of the top end of the bottom plate, a storage battery is fixed to one end of the inner bottom wall of the battery bin, damping rods are fixed to the left side and the right side of the top end of the battery bin, and a mounting plate is fixed to the top end of a damping air bag; sound-absorbing cotton adheres to the inner side wall of the machine box, a diesel oil tank is fixed to the top end of the generator, and the hot melting tank is fixed to the side, away from the battery bin, of the top end of the bottom plate. Compared with an existing line drawing machine, the line drawing machine is provided with the standby power supply mechanism, when a battery is out of power, the line drawing machine can generate power and supply power, so that the charging time is saved, the endurance time of the line drawing machine is prolonged, meanwhile, the line drawing machine is provided with the lighting mechanism, lighting can be provided during construction at night, and the position of the line drawing machine can be warned; and nearby personnel or carriers are prevented from colliding with the device, and the practicability of the device is improved.

The present invention discloses a noise reduction earmuff, comprising an earmuff shell forming an earmuff cavity, a partition installed in the earmuff cavity and forming an independent cavity, and a conduit installed on the partition; one of the two end openings of the conduit is located in the cavity, and the other extends out of the cavity and is located in the earmuff cavity; the cavity and the conduit form a low-frequency resonator, and its resonance frequency is equivalent to the turning frequency of the low-pass filter formed by the earmuff. In solving the problem of earmuff isolation noise, the present invention adopts the method of arranging a low-frequency resonator in the earmuff cavity, and utilizes the resonance sound absorption effect of the low-frequency resonator to absorb the noise energy of passive sound insulation in the earmuff cavity near the resonance frequency of the low-frequency resonator, thereby avoiding the noise lifting and amplification problem in the low-frequency part of passive sound insulation, and realizing the balance of noise attenuation energy and attenuation frequency band in the earmuff cavity, which can not only protect human ears, but also reduce the overall size of the earmuff and improve the comfort of the wearer.

The utility model relates to a ganoderma spore powder processing equipment technical field especially relates to a ganoderma spore powder processing is used to reduce noise wall breaking machine. Its technical scheme includes base, the top of base is equipped with the wall breaking cup body for processing, one side of wall breaking cup body is equipped with the pull handle, the outside of wall breaking cup body is equipped with the noise reduction structure for reducing the noise, the noise reduction structure includes the installation shell no.

The utility model discloses an individual soldier operation system protection device which comprises a protection mechanism which comprises a protection cap, and the outer wall of the protection cap is fixedly connected with a cap brim; the noise reduction mechanism comprises a fixed rod which symmetrically penetrates through the hat brim and is fixedly connected to two sides, a supporting rod is fixedly connected to the outer wall of the fixed rod, the supporting rod is fixedly connected to the outer wall of the protective hat, a movable rod is slidably connected to the outer wall of the bottom of the fixed rod, and a rotating frame is rotatably connected to the outer walls of the movable rod and the fixed rod; the fixing mechanism comprises a fixing cylinder and a dustproof mechanism, the fixing cylinder is fixedly connected to the earmuff in a penetrating mode, and the dustproof mechanism comprises a second connecting cylinder connected to the middle of the inner wall of the protective cover in a sliding mode. The problems that when an individual soldier works in a set area of a hydropower station in the prior art, noise and vibration can be generated when mechanical equipment of the hydropower station operates, and hearing and body health of workers can be affected when the mechanical equipment is exposed in the environment for a long time are solved.

The invention discloses an audio signal adjusting method and device, virtual reality equipment and a storage medium. The method comprises the following steps: determining a binaural hearing threshold value of a current user; determining a first target audio signal and a second target audio signal according to the binaural hearing threshold; and adjusting a left sound production unit of the virtual reality equipment according to the first target audio signal, and adjusting a right sound production unit of the virtual reality equipment according to the second target audio signal. According to the invention, the volume of the left and right sound channels of the virtual reality equipment can be intelligently and independently adjusted according to the hearing difference between the two ears of the user, so that the effective sound pressure levels received by the two ears are balanced, and the immersion and comfort of VR experience are remarkably improved.

The invention discloses a decompression type hearing protection mechanism and an earphone in the technical field of hearing protection structures. The pressure reduction type hearing protection mechanism is applied to an earphone and specifically comprises a sound outlet channel, the sound outlet channel is detachably connected with the earphone, the sound outlet channel is sleeved with a blocking noise reduction part, and the blocking noise reduction part abuts against the outer wall of the sound outlet channel; an extrusion silencing part is sleeved outside the blocking silencing part, a contact part is arranged outside the extrusion silencing part, and the contact part is used for being in contact with an ear canal; and the material density of the blocking noise reduction part is higher than that of the extrusion noise reduction part. Wherein the earphone comprises a reduced-pressure hearing protection mechanism. Noise filtration and pressure reduction of the inner wall of the auditory meatus are effectively considered through different material densities of the blocking silencing part and the extrusion silencing part, so that the purpose of protecting hearing can be achieved on the basis of reducing the pressure of the auditory meatus.