57 results about "Internal noise" patented technology

Techniques and devices for performing internal noise source filtering for active acoustic sensing are described. With internal noise source filtering (202), interference caused by the hearing-worn device (102) performing other operations (e.g., rendering audio content (204), performing active noise cancellation (206), or operating according to a pass-through mode (214)) may be attenuated within the received ultrasound signal to improve the sensitivity and accuracy of audio volumetric tracing. This performance improvement enables audio plethysmography to be performed when the audible wearable device (102) performs these other operations. Further, it improves the ability of audio plethysmography for speech processing, which may include speech activity detection, speech recognition, and / or dialog detection.

The invention discloses a fully-implanted artificial cochlea system and a noise reduction method thereof.The fully-implanted artificial cochlea system comprises an implant and a fully-implanted microphone, the fully-implanted microphone comprises a shell, a PCBA board, a first sound sensor and a bone conduction sensor are arranged in the shell, the first sound sensor is connected with the PCBA board and used for receiving a first external sound signal and transmitting the first external sound signal to the PCBA board, and the bone conduction sensor is connected with the implant. The bone conduction sensor is also connected with the PCBA board and is used for collecting an in-vivo noise signal and transmitting the in-vivo noise signal to the PCBA board; the PCBA board is used for receiving the first external sound signal and the in-vivo noise signal, and at least performing noise reduction on the first external sound signal and then outputting the first external sound signal; the implant or the fully-implanted microphone is connected with a second sound sensor, the second sound sensor is connected with the PCBA, the second sound sensor receives a second external sound signal and transmits the second external sound signal to the PCBA board, and the PCBA board receives the second external sound signal, at least carries out noise reduction on the second external sound signal and then outputs the second external sound signal; according to the system, the wearing comfort of a user is effectively improved, the efficient noise reduction performance is met, and the hearing requirement of a user patient can be met.

The invention relates to a voice recognition method and device of a vehicle, the vehicle and a storage medium, and the method comprises the steps: collecting a voice instruction of the vehicle; in response to the voice instruction, acquiring video data corresponding to the voice instruction, and determining weights of the voice instruction and the video data according to the internal noise level of the vehicle; and based on the voice instruction and the weight of the video data, fusing the video data and the voice instruction to identify an actual control intention of the user, and controlling the vehicle to execute a control action corresponding to the actual control intention. According to the embodiment of the invention, the complementarity of the voice data and the video data can be utilized, more accurate voice recognition is realized, the limitation on the pronunciation standard of the user is reduced, the voice recognition is more humanized, the probability of wrong recognition is reduced, and the interaction experience of the user is improved.

An acoustic wave device that can correctly perform an operation as the acoustic wave device and can achieve suppression of internal noise interference, a method of manufacturing the same, and a module are provided. The acoustic wave device includes a base member provided with a plurality of side surfaces, a ground pad wire, and a first shield film that covers the plurality of side surfaces. Since the ground pad wire and the first shield film are electrically connected to each other, operation as the acoustic wave device can correctly be performed and internal noise interference can be suppressed.

The invention belongs to the technical field of noise reduction devices, and discloses a driver which comprises a mounting shell, a motor, a noise reduction shell and an internal noise reduction part. The motor is installed in the installation shell, and the output end of the motor is rotationally arranged in the installation shell. The noise reduction shell is provided with a noise reduction cavity and an installation opening, the noise reduction cavity is communicated with the installation opening, the motor at least partially extends into the noise reduction cavity through the installation opening, and the noise reduction cavity at least partially wraps the outer surface of the motor so that most noise generated by the motor can be effectively isolated in the noise reduction cavity and prevented from being transmitted to the external environment. Therefore, the noise level of the surrounding environment of the driver is greatly reduced. The internal noise reduction part is provided with a sheet-shaped body, the sheet-shaped body is provided with an installation part, the installation part is attached to the inner wall of the installation shell so as to absorb noise in the installation shell and weaken noise transmitted to the external environment, the noise reduction effect is achieved, the noise reduction shell and the internal noise reduction part are matched with each other, all-directional and multi-way noise reduction is achieved, and therefore the home experience of a user is improved.

The invention relates to a method and a system for simulating internal noise of a slave clock in a master-slave synchronization network in the technical field of clock synchronization. The method comprises the following steps: establishing a first equivalent model and a second equivalent model; generating a first phase-locked loop output power spectral density function based on the first equivalent model, and generating a second phase-locked loop output power spectral density function based on the second equivalent model; calculating equivalent loop bandwidth conditions of the first equivalent model and the second equivalent model; a second phase-locked loop output power spectral density function is updated by using a loop bandwidth condition, a gain coefficient and a slave clock bandwidth of a second equivalent model are calculated by using a TDEV template and an MTIE template, and the second phase-locked loop output power spectral density function is updated for the second time to obtain a noise generation time domain function; the problem that the stability of the slave clock cannot be accurately simulated due to the fact that the MTIE corresponding to the generated time domain noise exceeds the limit of the MTIE template because only the TDEV template is considered and the MTIE template is not considered in the existing method for simulating the internal noise of the slave clock is solved.

A microwave quantum detection method based on environmental noise fine perception comprises the following steps: step 1, constructing a parallel link of environmental noise perception and signal detection, adding an antenna and a low-temperature switch at the front ends of the environmental noise perception link and the signal detection link, connecting the two links in parallel, and switching between the environmental noise perception and the signal detection; step 2, acquiring environment noise distribution by using an environment noise sensing link: operating a low-temperature switch, selecting the environment noise sensing link, testing internal noise of the environment noise sensing link by adopting a cold and hot load method, and measuring external environment noise by using the environment noise sensing link; and step 3, pointing to a target orientation by using a signal detection link, and performing signal detection: operating a low-temperature switch, selecting the signal detection link, determining an antenna pointing angle, obtaining environment noise of the angle, setting attenuation of an adjustable attenuator according to the external environment noise, and detecting signals by using a microwave quantum detection device.

The utility model provides a noise reduction power capacitor and a noise reduction core, and belongs to the technical field of machinery manufacturing, the noise reduction power capacitor comprises a capacitor housing, the top and the bottom of the capacitor housing are respectively provided with a top sound-proof cover and a bottom sound-proof cover through sealing washers, and the top of the capacitor housing is provided with a wire outlet sleeve in a manner of penetrating through the top sound-proof cover. A noise reduction core is installed in the capacitor shell, and a plurality of lifting pieces are installed on the two sides of the capacitor shell respectively. According to the utility model, the noise problem caused by each harmonic current of the capacitor can be solved through a method of internal noise reduction, external noise reduction or combination of the internal noise reduction and the external noise reduction, and the internal noise reduction, the external noise reduction or the combination of the internal noise reduction and the external noise reduction can be independently used according to different frequencies and sizes of the harmonic current borne by the power capacitor. And the noise is reduced.

The present application relates to speech processing technology in the field of artificial intelligence, and in particular to a speech processing method, medium, electronic device and system based on multiple devices, which can alleviate the impact of the internal noise of electronic devices that are playing audio in multi-device scenarios on the sound pickup effect of voice assistants, ensure the sound pickup effect of voice assistants based on multiple devices, and thus help to ensure the accuracy of voice recognition of voice assistants, and improve the environmental robustness of speech recognition in multi-device scenarios. The scheme includes: a first electronic device among multiple electronic devices picks up sound to obtain a speech to be recognized; the first electronic device receives audio information related to the audio played by the second electronic device among the multiple electronic devices; the first electronic device performs noise reduction processing on the picked-up speech to be recognized based on the received audio information. The scheme is specifically applied to the process of voice assistants picking up sound based on multiple devices.

The utility model provides a liquid accumulator and a compressor with the same. The liquid storage device comprises a cylinder body, wherein a storage space used for storing fluid is defined by the cylinder body; the noise reduction assembly is arranged in the storage space; the noise reduction assembly spirally extends in the extending direction of the barrel. According to the technical scheme provided by the utility model, the technical problem that the noise in the liquid storage device in the prior art is relatively large can be solved.

The utility model relates to the technical field of noise reduction motor covers, and discloses a noise reduction motor cover structure, which comprises a cover shell and a cover cap, the cover cap is arranged at the bottom end of the cover shell, the inner wall of the cover cap is fixedly connected with second sound absorption cotton, the outer part of the second sound absorption cotton is fixedly connected with a second sound absorption plate, and the outer part of the second sound absorption cotton is fixedly connected with the second sound absorption plate. The inner wall of the housing is fixedly connected with first sound-absorbing cotton, and the exterior of the first sound-absorbing cotton is fixedly connected with a first sound-absorbing plate. According to the silencing motor cover structure, parts such as a cover shell are arranged, the inner wall of a cover cap is fixedly connected with second sound absorption cotton, the outer portion of the second sound absorption cotton is fixedly connected with a second sound absorption plate, the inner wall of the cover shell is fixedly connected with first sound absorption cotton, and the outer portion of the first sound absorption cotton is fixedly connected with a first sound absorption plate; the sound-absorbing cotton and the sound-absorbing plate can be used for conveniently absorbing and reducing internal noise, so that the noise generated when the motor works is conveniently absorbed and isolated, and the problem that the noise reduction effect is not good enough due to the fact that a function of strengthening sound insulation and noise reduction is not arranged inside is solved.

The utility model relates to the technical field of vehicle air conditioner noise elimination, in particular to a vehicle air conditioner air duct assembly internal noise elimination mechanism which comprises a noise elimination cylinder, a fixing piece used for fixing noise elimination cotton in the noise elimination cylinder is arranged in the noise elimination cylinder, and positioning pieces used for limiting the fixing piece in the noise elimination cylinder are arranged at the two ends of the noise elimination cylinder. One end of the outer wall of the silencing cylinder is fixedly connected with two symmetrical flange rings. According to the utility model, the two sponges and the silencing cotton are used for silencing flowing air for multiple times, so that when an air conditioner in a vehicle is started, the interior of the vehicle is quieter, the sponges can absorb moisture and impurities in the flowing air, the service life of the silencing cotton is longer, and the limiting ring is detachably connected with the silencing barrel and the connecting ring, so that the silencing effect is better. Not only can the silencing cotton be quickly disassembled and assembled, but also the silencing barrel, the fixing piece and the positioning piece can be recycled, so that the resource loss is reduced, and the cost expenditure of a driver is reduced.

The utility model discloses an armored entrance door with a built-in noise reduction structure, which relates to the technical field of noise reduction of armored entrance doors and comprises a wall body, an installation unit is arranged on the inner side of the wall body, a buffer unit is arranged on the inner side of the installation unit, a noise reduction unit is arranged on one side of the installation unit, and the noise reduction unit is arranged on the other side of the installation unit. A heat insulation unit is arranged on one side of the noise reduction unit and comprises a water tank, the water tank is arranged on one side of the noise reduction unit, a refrigerator is fixedly connected to the top face of the water tank, a refrigeration pipe is arranged on the inner side of the water tank, a pump machine is arranged on the top face of the water tank, and the water suction end of the pump machine is connected into the water tank in a sleeved mode. The water outlet end of the pump machine is connected with the circulating heat absorption pipe in a sleeved mode. Through the arrangement of the water tank, the refrigerator, the refrigerating pipe, the pump machine and the circulating heat absorption pipe, the heat of the armored door plate is reduced, the heat insulation effect of the armored door plate is improved, and meanwhile the safety of a user is further improved.

The invention relates to the field of elevator noise monitoring, in particular to an elevator internal noise monitoring method and device. The method comprises the steps that internal noise and running speed data of a current elevator in a preset time period are obtained; feature extraction is carried out on the internal noise and the operation speed data, and internal noise features and operation speed data features are obtained in sequence; carrying out feature fusion on the internal noise and the operation speed data according to a time delay influence factor to obtain a fusion feature; wherein the time delay influence factor is determined according to the running speed data, the distance between the cloud end and the current elevator and the running state coefficient of the current elevator; and the fusion features are input into an elevator noise monitoring model, and the predicted noise of the current elevator is obtained. By means of the configuration mode, the monitoring precision of the internal noise of the elevator can be effectively improved, and powerful support is provided for guaranteeing the health of people.

The utility model discloses a noise-reduction wear-resistant steel ball, which relates to the technical field of wear-resistant steel balls, and comprises a steel ball body, a limiting groove is arranged on the surface of the steel ball body, a wear-resistant layer is fixedly connected in the limiting groove, an internal noise-reduction structure is fixedly connected in the steel ball body, and the wear-resistant layer is fixedly connected in the internal noise-reduction structure. The internal noise reduction structure comprises a filling cavity and a filling layer in the filling cavity. The effect of keeping the overall strength of the steel ball is achieved through the honeycomb-shaped filling cavities, in actual use, the compression strength loss of the steel ball is smaller than 5%, the steel ball body has good stability, the effect of absorbing vibration energy is achieved through the filling layer made of the composite damping material, and the service life of the steel ball is prolonged. And therefore, the steel ball body has a good noise reduction effect.

The present disclosure provides a test method and device, electronic equipment and storage medium. The present disclosure relates to the technical field of computers, specifically to the technical field of software testing. The specific implementation scheme is: in response to detecting a test instruction, running a test software, the test software integrating a to-be-tested speech recognition service software development kit (SDK) and a player SDK, the to-be-tested speech recognition service SDK and the player SDK belonging to different processes, the to-be-tested speech recognition service SDK and the player SDK being capable of cross-process communication, the player SDK being used for processing internal noise data; obtaining performance data of a process in which the to-be-tested speech recognition service SDK is located formed in a running process of the test software; and determining a performance test result of the to-be-tested speech recognition service SDK based on the performance data of the process in which the to-be-tested speech recognition service SDK is located. According to the scheme of the present disclosure, the accuracy of the performance test of the speech recognition service SDK can be improved.

This invention provides a low-noise amorphous alloy three-dimensional transformer. The invention relates to the field of amorphous alloy transformer technology, and includes an internal noise reduction mechanism installed inside the transformer body and a second noise reduction component installed on the outside of the transformer body. The transformer body includes a housing, heat sinks, an oil tank, and a core module. The oil tank and core module are installed inside the housing, and the heat sinks are fixed to the outside of the housing. The internal noise reduction mechanism includes a buffer component, a first noise reduction component, a mounting component, and a barrier chamber. Through the coordinated use of the buffer component, the first noise reduction component, and the second noise reduction component, this solution establishes a three-level coordinated noise reduction system of "source vibration reduction, near-field isolation, and remote shielding." The vibration of the core module is directly absorbed by an air spring, and the double-layer structure of the barrier chamber and the outer protective cover achieves full-path blocking of solid-borne sound and airborne sound, ultimately meeting the most stringent quiet zone standards for noise emission.

The invention provides a high-precision delta-sigma modulator based on time-sharing chopping. The high-precision delta-sigma modulator comprises a first-stage integrator, a second-stage integrator, a third-stage integrator, an adder, a comparator, two pairs of chopper circuits and an analog-to-digital converter, according to the invention, two pairs of chopper circuits are arranged, a time-sharing clock control technology is adopted, and a virtual device layout matching design is combined, so that accurate suppression of multi-source low-frequency interference is realized. The modulator adopts a three-order CIFF architecture, internal noise and imbalance of an operational amplifier are eliminated through a time-sharing controlled chopper 1, input charge injection, switching nonlinearity and DAC feedback errors are eliminated through a system-level chopper 2, and the stability of the sampling and integration process is ensured in cooperation with an optimized clock delay design. Under the sampling frequency of 1.024 MHz, the signal-to-noise distortion ratio reaches 106.7 dB, the noise suppression capability is improved by 68.1 dB, and the total power consumption is only 504 mu W.

A computer-implemented method for filtering at least one useful signal from at least one noisy acoustic signal of an input signal, includes receiving, from at least one acoustic sensor, the input signal, wherein the at least one useful signal is designed as a siren signal, wherein the input signal is noisy due to wind noise, tire rolling noise, or vehicle internal noise, and a noise component of the input signal masks the at least one useful signal contained in the input signal. The method further includes applying at least one correlation function to the input signal, wherein the correlation function is applied iteratively to result data of the correlation function to increase a signal-to-noise ratio of the input signal.

The ultra-silence HDPE pipe comprises an inner pipe body and an outer pipe body, supporting connecting ribs are arranged between the inner pipe body and the outer pipe body in the circumferential direction at equal intervals, porous silence foam pads are filled in gaps among the inner pipe body, the outer pipe body and the supporting connecting ribs, and drainage plates parallel to the central axis of the inner pipe body are arranged on the inner wall of the inner pipe body in the circumferential direction at equal intervals. The inner wall of the inner pipe and the surface of the drainage plate are each provided with a mute coating, and the surface of the outer pipe is provided with a porous mute outer sleeve. The porous mute foam pad is arranged in the inner pipe, the porous mute outer sleeve is arranged outside the outer pipe, noise reduction is conducted through a porous structure, outward transmission of internal noise is reduced, and the mute effect is improved; a drainage plate is arranged in the inner pipe, and a mute coating with a more compact and smoother structure is arranged, so that noise is reduced fundamentally; the drainage plate in the vertical pipeline can increase the wall-hanging guiding effect of water flow, and large noise caused by impact due to direct falling is reduced; and the mute effect is further improved on the basis of the existing double-layer structure.

This application discloses a thermally broken aluminum alloy casement window, belonging to the field of doors and windows. It includes an outer frame, an inner frame installed inside the outer frame via a thermally broken strip, a side frame mounted on the inner wall of the inner frame via two hinges, a sash frame fixedly installed on one side of the side frame, and a glass assembly installed inside the sash frame. Both the inner frame and the sash frame are equipped with Helmholtz resonators. The sound insulation layer filled inside the sash frame effectively isolates external noise and reduces the impact of internal noise. At the same time, some sound energy can be absorbed by the outer tempered glass and the intermediate PVB film, while the air layer of the inner double-glazed glass can further block the transmission of sound waves. Furthermore, the Helmholtz resonator can be used to specifically absorb noise of a certain frequency.

The application relates to a kind of automobile air conditioner refrigerant flow noise analysis method and system, comprising the following steps: the measured vehicle is placed in the preset test environment, and the internal noise of the measured vehicle is collected;Determine whether the internal noise of the measured vehicle is airflow sound, if so, the internal noise of the measured vehicle is converted into loudness peak difference and sharpness peak difference, otherwise, determine whether the internal noise of the measured vehicle is flow water sound;If so, calculate the kurtosis value of expansion valve vibration, otherwise, the internal noise of the measured vehicle collected this time is useless data, discarded and ended;According to the loudness peak difference, sharpness peak difference and expansion valve vibration kurtosis value, combined with the preset noise severity evaluation method, the air conditioner refrigerant flow noise is evaluated, and the evaluation result is output.The application effectively quantifies the size of refrigerant flow noise objectively, and avoids the subjective evaluation difference of different groups of people on fan beat frequency noise annoyance.

A technique for synchronizing a secondary clock (100; 800; 900; 1091; 1092; 1130) with a primary clock (300) is provided. As to a first method aspect, a method comprises a step of receiving (202), from the primary clock (300), a synchronization signal (302) indicative of a reference time at each of a plurality of synchronization events. The method further comprises a step of estimating (204) an offset and a skew of the secondary clock (100; 800; 900; 1091; 1092; 1130) based on the reference time and a local time retrieved from the secondary clock (100; 800; 900; 1091; 1092; 1130) for each of the synchronization events. The offset and the skew of the secondary clock (100; 800; 900; 1091; 1092; 1130) are estimated (204) using a Kalman filter, KF, comprising an offset variance and a skew variance. The offset variance being indicative of a power of noise of the offset and the skew variance being indicative of a power of noise of the skew. The offset variance is set according to an internal noise power measured for the secondary clock (100; 800; 900; 1091; 1092; 1130). The skew variance is set according to an external influence on the secondary clock (100; 800; 900; 1091; 1092; 1130) measured for an environment of the secondary clock (100; 800; 900; 1091; 1092; 1130). The method further comprises a step of updating (206) the secondary clock (100; 800; 900; 1091; 1092; 1130) based on the estimated (204) offset and skew.

The application relates to a method and system for simulating internal noise of a slave clock in a master-slave synchronization network in the technical field of clock synchronization, and comprises the following steps: establishing a first equivalent model and a second equivalent model; generating a first phase-locked loop output power spectral density function based on the first equivalent model and generating a second phase-locked loop output power spectral density function based on the second equivalent model; calculating a loop bandwidth condition equivalent to the first equivalent model and the second equivalent model; updating the second phase-locked loop output power spectral density function using the loop bandwidth condition, and calculating the gain coefficient and the slave clock bandwidth of the second equivalent model using a TDEV template and an MTIE template, and then updating the second phase-locked loop output power spectral density function again to obtain a noise generation time domain function. The method solves the problem that the existing method for simulating internal noise of a slave clock only considers a TDEV template and does not consider an MTIE template, so that the corresponding MTIE of the generated time domain noise exceeds the MTIE template limit, and the stability of the slave clock cannot be accurately simulated.

The invention belongs to the technical field of communication measurement noise cancellation, and particularly relates to a noise cancellation method based on a WIFI7 standard protocol and application thereof. A real-time measurement average noise cancellation algorithm is adopted, and a noise coefficient is calculated by capturing internal noise when no signal is input and capturing average extracted total noise signals for multiple times, so that external noise is estimated, and single-time captured signals are corrected. According to the invention, a noise cancellation method based on measurement averaging is adopted, so that not only can inherent noise of the signal analyzer be eliminated, but also ircoherent noise in the signal can be eliminated; a convolution correlation algorithm is adopted for synchronization, and the method is suitable for more complex noise environments; and a real-time dynamic averaging method is adopted, so that the stability of the offset effect can be ensured, and the algorithm efficiency is improved. In addition, the method is low in implementation cost and complexity, can be implemented in an FPGA (Field Programmable Gate Array) or a DSP (Digital Signal Processor) in a software mode, has good reconstruction capability and is very suitable for various application environments.

This invention discloses a method and system for predicting the resistive current of surge arresters based on a combination of VMD-MVO-ESN. To select and design suitable surge arresters, evaluate and compare their lightning protection capabilities in power systems, and ensure their performance and reliability under specific operating conditions, accurate prediction of the resistive current of surge arresters is necessary. In this invention, the original resistive current sequence is decomposed using variational mode decomposition (VMD), eliminating internal noise. Multiple signal components after decomposition are simultaneously used to build models. The structural parameters in the reservoir of the echo state network are optimized using a multiverse algorithm. Finally, the predictions of each signal component are completed, and the results are combined and accumulated to achieve accurate prediction of the resistive current of the surge arrester, ensuring the safe and stable operation of the power system.

An electrical cabinet with shock absorption and noise reduction functions is composed of a cabinet body and a shock absorption device, the shock absorption device comprises a first fixing base and a second fixing base which are horizontally and oppositely arranged, a sliding groove is formed in the second fixing base, and a limiting column sleeved with a first spring and a sliding block capable of sliding along the limiting column are arranged in the sliding groove; the sliding block is rotationally connected with the first fixed seat through the rotating plate, so that external vibration energy can be effectively absorbed and dispersed, and the impact of vibration on the cabinet body is relieved; l-shaped containing frames are arranged on the outer walls of the left side and the right side of the cabinet body, and sound absorption plates are installed in the containing frames to absorb internal noise generated during operation of the electrical cabinet and noise transmitted from the outside; the clamping device is arranged on the upper side of the cabinet body, and the insertion block on the clamping device is matched with the insertion groove of the sound absorption plate, so that the sound absorption plate is conveniently mounted and dismounted. According to the design, by means of the damping device, stable operation can be achieved in a long-term vibration environment, and the noise reduction function is achieved while the requirements for maintenance and replacement are met through cooperative use of the sound absorption plate and the clamping device.

The utility model relates to the technical field of sound insulation wallboards, in particular to an optimized structure of a ground shock absorption and sound insulation wallboard, which comprises a sound insulation board body, the sound insulation board body comprises a bottom layer, an inner layer is arranged at the top of the bottom layer, a sound insulation layer is arranged at the top of the inner layer, a shock absorption layer is arranged at the top of the sound insulation layer, and a surface layer is arranged at the top of the shock absorption layer. According to the ground shock absorption and sound insulation wallboard optimized structure, by designing multiple layers of sound insulation materials, introduction of external noise and propagation of internal noise are effectively blocked, so that the sound insulation performance of a hearing screening room can be remarkably improved, it is ensured that the testing environment is quiet, external interference is reduced, and the accuracy of hearing testing is improved; according to the hearing test device, the vibration from the ground can be effectively absorbed, the influence of the vibration on the upper layer structure is reduced, and when a hearing test is carried out, the device and a testee cannot be interfered by the ground vibration, so that the reliability of a test result is improved.

The utility model belongs to the technical field of generator sets, and particularly relates to a novel rain-proof wind scoop which comprises a wind guide assembly, a wind scooper and a wind scooper, the air inlet hole is formed in the side wall of the generator set and located in one side of the air guide assembly; the air guide assembly comprises at least one Z-shaped plate and at least one inverted first L-shaped plate; a gap between the Z-shaped plate and the L-shaped plate is an air inlet channel; the second L-shaped plate is arranged at the air outlet end of the air inlet channel so as to guide the air flow to the upper part of the interior of the generator set; by arranging the air guide assembly, the air inlet channel is prolonged, the air inlet speed is reduced, and the air flowing noise is reduced; the air channel is of a partition structure and is matched with sponge, outward transmission of internal noise is reduced, and noise pollution is reduced.

The utility model discloses an audio acquisition device capable of reducing noise, which relates to the technical field of electronic information, and comprises an audio acquisition machine body, the front end of the audio acquisition machine body is fixedly connected with a control panel, and the audio acquisition device capable of reducing noise is provided with a blowout prevention cover, sound absorption cotton, a rubber ring and a silica gel leather surface. In the audio collection process, most of external noise can be filtered through the sound absorption cotton, then the noise is filtered through the blowout prevention cover before entering the heart-shaped pointing microphone for collection, and in the machine using process, due to the fact that the periphery of the audio collection machine body is completely covered with the silica gel leather face which is soft and elastic, the sound absorption cotton is arranged, and the sound absorption cotton is not prone to falling off. When in use, the touch noise is not recorded, meanwhile, the periphery of an electronic element is wrapped with a rubber ring, it is guaranteed that gap hollowing cannot occur in the machine while damping is achieved, internal noise cannot occur due to vibration when the device is moved, and the problem that the device cannot reduce noise is solved.