5results about How to "Reduce environmental noise" patented technology

The invention provides an eyeshade capable of pressing acupuncture points to promote sleep. The eyeshade comprises an eyeshade body and an eyeshade head band assembly. The eyeshade comprises an eyeshade body, a middle U-shaped convex block and a top convex block, the eyeshade body is used for shading the eyes and is positioned through the middle U-shaped convex block of the eyeshade and the concave position of the nose bridge, at the moment, the top convex block of the eyeshade is just pressed on the Yintang acupoint, and the two sides of the eyeshade are each provided with two side holes connected with the eyeshade head band assembly; the eyeshade head band assembly comprises an eyeshade head band, earplugs and silica gel round head protruding blocks, the eyeshade head band assembly and the eyeshade are connected in a bonding mode through hook-and-loop fasteners, the eyeshade head band and the ears are positioned through two ear openings, and the earplugs are arranged according to the distance between the sleeping acupoint and the ears. The vacant positions where the silica gel round head protruding blocks on the two sides of the eyeshade head band are located are adjusted to be aligned with the peaceful acupoint to press the peaceful acupoint, the earplugs are used for reducing noise of ears, and at least one mouth-shaped notch is formed in the eyeshade head band and the head body of a user to achieve the limiting effect.

This invention discloses an audio enhancement system and method for underground broadcasting systems, relating to the field of audio enhancement technology. The system acquires noise signals and original audio signals from a mine roadway, processes them through standardization, encodes and transmits them, and then decodes them to obtain a standardized noise signal. The standardized noise signal undergoes frequency band amplitude shaping and time delay compensation, followed by a phase inversion operation to generate a reverse noise signal. Based on the original audio signal and a roadway sound reflection model, the reverberation component within the roadway is predicted. After phase inversion, a reverse reverberation signal is generated, and a reverberation gating coefficient is introduced for weighted control to obtain the actual reverse reverberation signal. The original audio signal, the reverse noise signal, and the actual reverse reverberation signal are then superimposed to obtain the final audio signal. Utilizing the principle of destructive interference, the system effectively reduces the impact of environmental noise and reverberation.

The utility model provides a sound-absorbing crystal wood board convenient to install, which comprises a plurality of composite sound-absorbing boards, the whole composite sound-absorbing boards are arranged in a rectangular shape, two ends of each surface of each composite sound-absorbing board are respectively provided with an installing groove, and a connecting mechanism is clamped in each installing groove. During use, after the edges of the two composite acoustic panels are aligned, the I-shaped connecting blocks can be embedded into the inverted-T-shaped mounting grooves, the limiting springs are compressed under the extrusion of the inner walls of the mounting grooves by utilizing the guide of the inclined planes of the right-angled trapezoidal clamping blocks, and when the connecting blocks are inserted into the clamping grooves, the clamping blocks reach the clamping grooves, the clamping blocks can be clamped into the clamping grooves; each surface of the composite acoustic panel is provided with a mounting groove and a connecting mechanism, multi-direction extension splicing is supported, the mounting flexibility is improved, during dismounting, the push block with the anti-skid groove is pushed to drive the clamping block to be separated from the clamping groove, the connecting block can be taken out, quick dismounting is realized, and the use convenience is remarkably improved.

A wearable two-way communication audio device includes: a first microphone providing a first microphone signal; a second microphone that provides a second microphone signal; and one or more processors. The one or more processors are configured to estimate an ambient noise level using the second microphone signal and adjust the equalization filter based on the estimated ambient noise level. The first microphone signal and the second microphone signal may be processed via a first beamformer to provide a first beamformed signal, and the first beamformed signal may be filtered with an equalization filter to provide a noise estimation signal. The one or more processors may also use the noise estimation signal to generate a voice output signal for transmission to a remote recipient.

The utility model discloses an explanation emitter and a wireless explanation device. The explanation emitter comprises a housing, a control mainboard, a moving-coil microphone, a microphone protection net, a transceiver, a transmit-receive antenna and a battery. The shell is provided with a head part and a tail part which are away from each other; an accommodating cavity is formed in the shell; at least part of the surface of the shell forms a handle part; the control mainboard is arranged in the accommodating cavity; the moving-coil microphone is arranged at the head part of the shell and is electrically connected with the control mainboard; the microphone protective net cover is arranged at the periphery of the moving-coil microphone and is connected with the shell; the transceiver is arranged in the accommodating cavity and is electrically connected with the control mainboard; the transmitting-receiving antenna is arranged in the accommodating cavity and is far away from the area where the handle part is located, and the transmitting-receiving antenna is further electrically connected with the control mainboard; the battery is arranged in the accommodating cavity and is electrically connected with the control mainboard; by adopting the moving-coil microphone, the sound of an explainer can be picked up at a short distance, a large amount of picked environmental noise is reduced, and the voice definition and intelligibility are improved.