127 results about "Decibel" patented technology

The embodiment of the invention relates to the technical field of vehicles, and discloses an atmosphere lamp control method and device, a vehicle and a computer readable storage medium, and the method comprises the steps: obtaining the frequency domain information of a to-be-played audio, then determining the target decibel corresponding to each frequency band range in a plurality of preset frequency band ranges according to the frequency domain information, and obtaining the target decibel corresponding to the target decibel; the multiple frequency band ranges are frequency band ranges obtained by dividing a low-frequency part and a high-frequency part of the audio frequency, the frequency band width of the frequency band range corresponding to the low-frequency part is smaller than that of the frequency band range corresponding to the high-frequency part, and finally the atmosphere lamp is controlled to operate according to the target decibel corresponding to each frequency band range. By applying the technical scheme of the invention, the dynamic change of the atmosphere lamp can be coordinated with the music content, so that the user experience is improved.

The invention relates to the technical field of equipment anomaly recognition, and particularly discloses an equipment anomaly behavior recognition method and system based on audio and video streams, and the method comprises the steps: collecting equipment operation audio decibel values, preprocessing the audio decibel values to obtain digital audio streams, converting the digital audio streams to obtain a detection spectrogram, calculating a wave crest offset ratio and a wave crest number ratio, and obtaining section anomaly values; the method comprises the following steps: acquiring a video image of an equipment connection part, calculating a position and an angle offset ratio by using an algorithm to obtain a stable value of a part, judging and generating an abnormal analysis signal, further calculating an abnormal difference ratio, a stable difference ratio and an equipment abnormal ratio based on the abnormal analysis signal, drawing a change curve, and calculating an angle offset ratio, variance and the like to obtain linear values. The system comprises an audio acquisition and analysis module, a video analysis module and an abnormity judgment module. The device abnormal behavior can be effectively identified, and the device maintenance efficiency is improved.

The invention discloses a multi-information fusion hydraulic cylinder internal leakage fault diagnosis method, and relates to the technical field of hydraulic cylinder fault diagnos.The hydraulic cylinder internal leakage fault diagnosis method comprises the steps that firstly, a hydraulic cylinder heavy load, time-varying and nonlinear motion curve and a test system based on a multi-source sensor are constructed, and internal leakage fault evolution under the actual working condition is simulated; and secondly, developing a hybrid deep learning semi-supervised feature fusion framework based on a convolutional auto-encoder, a multi-head attention mechanism, residual connection and a bidirectional sequential network, and enhancing the characterization learning ability of a multi-source signal in a complex and multi-noise environment through omnibearing deep feature decoupling. And finally, feature extraction and fusion are realized by using the displacement error and the pressure signal, and fault diagnosis is completed. Experiments show that compared with a comparison model, the diagnosis accuracy of the provided model and feature fusion strategy is improved by 3.95%; under-3 decibel noise, the accuracy is improved by 2.33%, and the scheme has high accuracy, reliability and generalization performance.

The invention provides an environmental noise evaluation method based on an annoyance perception index. The method comprises the following steps: determining an annoyance degree evaluation value of a sample according to the obtained environmental noise sample; training an XGBoost model by taking the environmental noise sample and the annoyance degree evaluation value as training samples to obtain a trained model; obtaining a to-be-tested original audio signal, and inputting the original audio signal into the trained model to obtain an annoyance degree evaluation value of the environmental noise; converting the environmental noise annoyance degree evaluation value into a sound source annoyance degree of the environmental noise according to the age of the target crowd; and finally, weighting the annoyance degree generated by a sound source and the annoyance degree generated by a sound level in the environmental noise, and calculating the annoyance degree of the environmental noise by taking decibel as a measurement unit. And the influence generated by the environmental noise can be described more accurately by taking the annoyance degree of people as an index.

The invention relates to a snore intervention method, a snore intervention device, electronic equipment and a storage medium, relates to the technical field of snore prevention appliance control, and is used for solving the problems that snore event recognition is inaccurate and overstimulation is prone to happening in the related art, and the snore intervention method comprises the steps that a sound signal generated in the sleep process of a target object is monitored, electromyographic signals of the target object are monitored, and features of the electromyographic signals are extracted; in response to determining that the decibel value corresponding to the sound signal is greater than or equal to the decibel threshold value and the characteristic value corresponding to the electromyographic signal is greater than or equal to the characteristic threshold value, determining that a snoring event occurs; and generating an electrical stimulation signal matched with the sound signal and the electromyographic signal, and intervening the snoring event based on the electrical stimulation signal to eliminate the snoring event. According to the snoring intervention method provided by the embodiment of the invention, the recognition accuracy of the snoring event can be improved, the occurrence of mistaken stimulation is reduced, and side effects caused by excessive electrical stimulation can be avoided.

The invention relates to the field of solid waste crushing equipment, and discloses a solid waste crushing equipment working state monitoring method and system, and the method comprises the steps: collecting a current signal, a vibration signal and a sound signal during the operation of solid waste crushing equipment; when the duration of the peak value of the current signal is smaller than a preset duration threshold value, the impact frequency characteristic of a first vibration frequency band exists in the frequency spectrum of the vibration signal, and the decibel peak value of the sound signal in the preset first frequency band is greater than a second preset threshold value, judging that the current signal is instantaneous load fluctuation; when the duration of the peak value of the current signal is greater than a preset duration threshold value and the vibration signal frequency spectrum presents continuous abnormal fluctuation with the period greater than a first preset duration, determining that a continuous overload fault occurs; if so, judging that the load fluctuates instantaneously; if yes, a feeding mechanism of the solid waste crushing equipment is controlled to reduce the feeding speed, and first prompt information is generated. According to the technical scheme, the monitoring accuracy is improved.

The invention discloses a reverberation adjusting method and device, display equipment and a storage medium, and relates to the technical field of display equipment, the method is applied to the display equipment, the display equipment comprises a loudspeaker and a microphone, and the method comprises the following steps: outputting a preset test sound source through the loudspeaker; when the output of the test sound source is stopped, starting the timing of the target reverberation time; collecting a reverberation signal through a microphone, and stopping timing of the target reverberation time when the sound pressure level of the reverberation signal is attenuated by a preset decibel; and adjusting a preset reverberation algorithm according to a time difference between the target reverberation time and a preset standard reverberation time, so that the time difference is smaller than a preset difference threshold. According to the method and the device, the reverberation algorithm can be adaptively corrected according to the environment where the user is located, so that the reverberation algorithm is matched with the current environment, the reverberation effect in the current environment can be close to the optimal reverberation effect in the test environment, and the karaoke experience of the user in the home environment is improved.

The present invention discloses an intelligent stop-barking method, device, and computer-readable storage medium. The method runs on an embedded terminal worn by a pet. The embedded terminal is built in with a preset pet barking model. The method includes: sound collection: obtaining a decibel value of ambient sound of the pet's surrounding environment; model comparison: if the decibel value of the sound is greater than a preset decibel value, then the sound collected is compared with the pet barking model and a comparison result is output; and output punishment: if the comparison result is greater than a preset punishment value, then the punishment module is triggered to stop the pet from barking. The technical solution, through machine learning models and signal processing techniques, enables high-accuracy dog barking sound recognition. It reduces reliance on powerful computing resources, and achieves stand-alone operation of data model, thereby improving feasibility and popularization.

The invention relates to the field of smart televisions, in particular to a volume configuration method and device, computer equipment and a storage medium, and the method comprises the steps: analyzing a standard audio file by using playing equipment of which the volume is to be configured, obtaining a standard audio analysis result, calculating to obtain a correction normal number, and analyzing real-time audio by using the playing equipment. And obtaining a real-time audio analysis result, performing matching in a preset configuration file according to the environmental noise value, and performing volume adjustment on the playing device with the volume to be configured. According to the volume configuration method, a standard audio analysis result is obtained through analysis of a playing device with the volume to be configured, a correction normal number is calculated in combination with a preset decibel, then an audio recorded by a recording device in real time is obtained and analyzed by the playing device, finally, a volume configuration scheme is matched in a preset configuration file according to the value, and the volume of the playing device is adjusted. Therefore, the audio file recorded by the recording equipment is analyzed to obtain real noise, and the volume of the playing equipment is automatically adjusted.

This application provides a spatial reuse method and a first device. The method is applicable to WLAN systems supporting EHT or 802.11be standards. The method includes the steps of receiving a physical layer protocol data unit (PPDU) transmitted by a second device, where the bandwidth of the PPDU includes a plurality of 20 megahertz MHz subchannels, and performing OBSS PD-based spatial reuse, where a first signal strength level of the received PPDU is less than an OBSS PD level, and the unit of the first signal strength level is decibel milliwatt dBm / 20MHz. According to the method provided in this application, it can be understood that when the first device cannot receive all 20 MHz subchannels of the entire bandwidth of the PPDU, or preamble puncturing occurs, or cannot obtain complete preamble puncturing information, it can still successfully measure the signal strength level. This increases the feasible scenarios in which OBSS PD-based spatial reuse can be performed, and improves the overall system throughput.

This application relates to a vacuum real-time leak detection system and method for tube bundles in direct air-cooled islands of thermal power plants. The system includes: a leak acoustic wave acquisition module installed at the connection points between the finned tubes of the air-cooled island radiator and the steam distribution pipe, and between the leaking finned tubes of the air-cooled island radiator and the condensate collection pipe, for acquiring acoustic wave signals from the tube bundles of the direct air-cooled island; a signal processing module for amplifying, filtering, and converting the leak acoustic wave signals; a judgment module for comparing the decibel value of the processed acoustic wave signal with a preset threshold; and a leak detection module for determining the leak area of ​​the leaking tube bundle based on the leak status and the address code of the leaking tube bundle. This solves the problems of related technologies, such as complex operation, long processing time, inability to monitor in real time, and difficulty in meeting the needs of continuous operation in thermal power plants.

The application relates to a blow molding product stack detection method, a system, a terminal and a storage medium, and belongs to the technical field of article stacking. The method comprises the following steps: acquiring the boxing weight of a current blow molding product as a current weight; determining the size relationship between the current weight and a weight threshold; if the current weight is greater than the weight threshold, acquiring foreign matter alarm prompt information; if the current weight is less than the weight threshold, acquiring a current decibel value when a box containing the blow molding product is moved; determining whether the current decibel value exceeds a preset decibel value; if yes, acquiring blow molding product loss prompt information; and if no, acquiring blow molding equipment abnormality prompt information. The application has the effect of better detecting the boxing quality of the blow molding product and reducing the possibility of unstable stacking of the box caused by the boxing problem as much as possible.

The invention relates to the technical field of electronic games, in particular to a Unity Audio Mixer-based game sound effect management method and related equipment, which respond to an externally input linear volume value, and determine a corresponding decibel value in combination with preset minimum and maximum volume thresholds; meanwhile, responding to an externally input sound effect name and a framing interval, checking whether a matching record exists in the interval list or not, if so, judging that an overlapping playing risk exists and stopping playing, and if not, judging that the overlapping playing risk exists and stopping playing if the matching record exists or the difference value is greater than the framing interval. If yes, updating the recording time and playing the corresponding sound effect according to the decibel value. The volume of a single sound effect can be accurately controlled, overlapped playing of the sound effects is avoided, and the game sound effect management effect and the user experience are improved.

The present application relates to the field of range hood equipment, and in particular to a range hood control method and range hood equipment, comprising: obtaining vibration data of a fan; fitting the vibration data into an amplitude-time curve; performing Fourier transform on the amplitude-time curve to obtain a first spectrum curve of the fan; obtaining vibration data of an interception module based on a preset working power; fitting the vibration data into an amplitude-time curve; performing Fourier transform on the vibration amplitude-time curve to obtain a second spectrum curve of the interception module; determining whether there is an overlapping area between the first spectrum curve and the second spectrum curve; if so, adjusting the preset working power to reduce the overlapping area. The present application reduces the overlapping area between the spectrum curve of the fan and the spectrum curve of the interception module by adjusting the working power of the interception module, thereby reducing the coherent influence of the noise of the fan and the noise of the interception module, and reducing the decibel value of the noise generated when the range hood is working.

The present application relates to a sound box volume intelligent adjustment method combining environmental noise monitoring and voice recognition, comprising the following: obtaining a first decibel value and a second decibel value of adjacent sampling intervals without human voice interference respectively; calculating the difference between the second decibel value and the first decibel value to obtain a decibel change value; judging the environmental noise change based on the decibel change value, if the environmental noise change is larger or smaller, triggering the voice recognition function, obtaining the feedback voice of the user and based on this to adaptively adjust the sound box volume. The present application uses the difference between the second decibel value and the first decibel value without human voice interference to approximately estimate the environmental noise change, when the environmental noise changes, the voice recognition function is triggered, the voice interaction with the user is carried out, and the sound box volume is adaptively adjusted, on the one hand, the volume can be adjusted in time when the noise fluctuates to adapt to the user's listening to the sound box content, on the other hand, the interaction with the user increases the user's experience.

The invention provides a microphone open circuit detection method, system and device and a medium, and the method comprises the steps: enabling an original audio to pass through a preset filter, and obtaining a target filtering audio; wherein the preset filter comprises a preset high-pass filter taking a first frequency as a cut-off frequency and a preset low-pass filter taking a second frequency as the cut-off frequency; determining a current decibel according to the target filtering audio; and determining a microphone open circuit state corresponding to the original audio according to the current decibel and a decibel threshold. Through the technical scheme of the application, the effect of detecting the open circuit state of the microphone without additionally adding hardware equipment is realized.

The invention provides a decibel calculation method for tire structure sound, and solves the problems that data acquisition is carried out in a specific environment or a limited speed range in most existing tire noise test methods, and a data analysis means is relatively single; the influence rule of the vibration characteristics of the tire in different frequency ranges on the in-vehicle noise cannot be fully captured, and the device can be widely applied to the field of tire testing. The method specifically comprises the following steps: uniformly reducing the speed of a tire from a high-speed rotating state to a low-speed rotating state, and collecting a vibration signal in the speed reduction process; preprocessing the vibration signal to obtain a frequency domain signal; obtaining frequency domain signal effective values of the frequency domain signals at low and medium frequencies on the X axis, the Y axis and the Z axis; and establishing a decibel calculation model according to the frequency domain signal effective value.

The application discloses a kind of rotating machinery early fault monitoring system and method based on high-frequency acoustic wave, belong to the field of fault detection, system includes high-frequency acoustic wave sensor, circuit system and host computer, high-frequency acoustic wave signal generated by rotating machinery early fault is obtained by high-frequency acoustic wave sensor, circuit system is made of multiple signal conditioning board and a piece of communication control board card, and host computer carries out data communication and instruction sending with circuit system by communication module.Utilize high-frequency acoustic wave signal decibel value to monitor fault, adopt high-frequency acoustic wave demodulation signal to identify fault, fuse multiple signal processing methods to obtain early fault sensitive optimization features, and diagnose by LSSVM parameter optimization method.The application has the advantages of high integration, low hardware requirement, channel number can be expanded, wide frequency detection range, saving data storage resources, etc., to realize preventive maintenance to rotating machinery early fault.

The invention discloses a refrigerator and a noise reduction method thereof. The refrigerator comprises a sensor, an auxiliary sound source and a controller. The sensor is configured to detect the noise value of the refrigerator in the operation process. The auxiliary sound source is configured to emit a masking sound according to a masking characteristic of a sound band. The controller is configured to obtain a first noise value detected by the sensor in the running process of the refrigerator; if the first noise value is greater than a preset decibel threshold value, searching a target frequency band from the frequency bands of the current noise, and calculating the noise amplitude of the target frequency band; according to the noise amplitude, determining a masking sound which is opposite to the target frequency band in phase; and controlling the auxiliary sound source to emit the masking sound.

The utility model relates to the technical field of measurement, and discloses a sound toy decibel measuring and positioning device, which comprises a main body assembly, a decibel measuring box, a positioning assembly, a decibel measuring box, a sealing door hinged on one side of the decibel measuring box, a handle fixed on one side of the sealing door, and a positioning piece arranged in the decibel measuring box, and the positioning piece comprises a placing frame. The sound toy box has the beneficial effects that the sound toy can be positioned at the central position of the box, and the distances and angles of the six microphones relative to the sound production part of the toy can be kept relatively fixed and balanced, so that the difference of acoustic parameters such as sound intensity and frequency received by each microphone each time can be greatly reduced; the stability and the accuracy of a sound pressure level result obtained through final comprehensive analysis can be improved, and the real sound production condition of the toy can be reflected more accurately.

The present invention relates to the technical field of centrifugal fans, and discloses a method for optimizing the parameters of a high-speed three-dimensional flow centrifugal impeller and a centrifugal fan, including: obtaining multiple mechanical parameter groups, constructing a centrifugal fan based on the extracted mechanical parameter groups, calculating loss parameters based on the centrifugal fan, calculating the sound source decibel corresponding to the centrifugal fan, confirming the noise detection environment and starting the centrifugal fan, extracting target detection points in sequence from the noise detection environment, constructing a noise decibel curve using the target detection points, obtaining centrifugal fan data based on the noise decibel curve, summarizing the centrifugal fan data, obtaining a centrifugal fan data set, screening the centrifugal fan data set, obtaining an optimized fan data set, and using the optimized fan data set to confirm the optimal three-dimensional flow centrifugal fan. The main purpose of the present invention is to combine the use scenario of the centrifugal fan, integrate the noise propagation model in the actual use scenario of the centrifugal fan into the simulation experiment of the centrifugal fan, so as to confirm the optimal centrifugal fan parameter group.

The invention relates to the field of cable voltage withstanding testing, in particular to a power cable voltage withstanding testing method, which comprises the following steps of: defining a scanning interval in combination with total capacitance of a cable and historical resonance data of the same type of cable in a three-stage resonance point searching mode of coarse scanning positioning of a candidate interval, fine scanning of refined data and secondary interpolation calibration; the problem of low efficiency of all-interval precise scanning is solved, and the defect of insufficient precision of empirical estimation can also be made up. According to the invention, the voltage compensation coefficient and the boost rate compensation value are respectively calculated based on the ground temperature and humidity environmental parameters of the test site, the dynamic correction of the test voltage and the boost rate is realized, and the influence of temperature and humidity on the cable insulation dielectric strength can be eliminated. According to the method, a mode of correlation analysis of discharge sound and current data is constructed in a boost stage, a defect area is positioned through a decibel attenuation trend, insulation abnormity is verified in combination with current fluctuation correlation, and a defect range is accurately narrowed to a single monitoring point interval or an adjacent monitoring point interval.

The invention discloses a self-adaptive pickup method for music rhythm, which comprises the following steps of: 1, acquiring a sound decibel value of a microphone in a period of time window based on an initial threshold value and an initial dynamic response range; 2, weighting and normalizing the sound decibel value collected in the time window, the initial threshold value and the initial dynamic response range, and updating the initial threshold value and the initial dynamic response range; step 3, acquiring a sound decibel value of the microphone in the next time window based on the updated threshold value and the dynamic response range, performing weighting and normalization processing on the sound decibel value collected in the time window and the threshold value and the dynamic range of the previous time window, and updating the threshold value and the dynamic range; and 4, circulating the step 3 until the music rhythm ends. The invention further provides a music light rhythm system, and the problems that the music rhythm effect is poor and the consistency is poor due to the difference of microphone devices, hardware circuits and structures are solved.

The invention provides a thermal power plant furnace tube leakage detection method and system, a storage medium and a program, and relates to the technical field of thermal power generation automatic control, and the method comprises the steps: S10, collecting a decibel signal of an operation unit furnace tube region in real time, and generating a decibel abnormal characteristic signal A; s20, acquiring a multi-source signal of an operation unit through a DCS system, calculating a weighted quotient value K according to the multi-source signal, and generating a flow and power anomaly characteristic signal B; s30, determining that the active power of the unit is greater than the minimum load threshold, and generating a load effective signal C; and S40, executing a first logic AND operation according to the flow and power anomaly characteristic signal B and the load effective signal C, and generating a working condition effective signal D. Compared with the prior art, the method has the following beneficial effects: firstly, the false alarm rate of boiler tube leakage is reduced to 8.3% from 38% of the traditional method; and 2, full-automatic operation is realized through a modular architecture, and the manual intervention rate is greatly reduced.

The method comprises the following steps: determining a sound source position of the ball mill, and obtaining noise decibel information of each bin of the ball mill through a sound level meter in a ball mill milling sound detection system; transmitting the noise decibel information to an acoustic analyzer of the ball mill grinding sound detection system, and converting the noise decibel information into an acoustic image cloud picture; and analyzing the sound image cloud picture to obtain sound waves of different bins of the ball mill so as to determine the working state of the ball mill. Through the acoustic analysis technology, noise decibel information obtained by the sound level meter is displayed on the acoustic analyzer through a picture in a spectrum or image mode, an operator directly determines the working state of the ball mill according to the change height of a picture wave band, the phenomena of full grinding and full grinding of the ball mill are avoided, the operation efficiency of the ball mill is improved, and the working efficiency of the ball mill is improved. Meanwhile, hearing injury and personal injury caused by the fact that a mill worker listens to the mill sound on site are avoided, and a solid foundation is provided for intelligent and informatization operation.

The invention provides a method for suppressing harmonic waves of an echo path. The method comprises the following steps: S1, acquiring an audio signal and processing the audio signal; s2, performing frequency domain conversion to extract amplitude, including reading near-end and far-end voices, and framing and windowing the voices; fourier transform is carried out on each frame, and voice amplitude information is extracted; s3, fundamental waves and harmonic waves are extracted and calibrated, specifically, peak detection is conducted on the near-end amplitude and the far-end amplitude, and an amplitude frequency band meeting the height is returned; determining a fundamental wave frequency band from the far-end frequency bands; determining a harmonic frequency band from the near-end frequency bands; converting the harmonic amplitude into a decibel value; storing the fundamental wave, the corresponding harmonic wave and the corresponding decibel value in a calibration file; s4, harmonic suppression processing; s5, reconstructing the audio signal, including Fourier inversion, and converting a frequency domain into a time domain; and storing each frame of data. According to the method, fundamental wave and harmonic wave frequency bands are determined by analyzing far-end and near-end voice amplitude information, so that calibration is carried out, and finally harmonic waves in an echo path are suppressed to achieve an echo cancellation effect.

The present application provides a method, device and medium for reducing the noise of game team voice based on a dynamic threshold mechanism. The method includes: dividing the audio signal into multiple time frames, converting the amplitude or decibel value of the time frame to obtain an energy value; comparing the energy value with the initial threshold, if the energy value is lower than the initial threshold, marking it as a noise frame or a low-priority frame, if the energy value is higher than the initial threshold, retaining it as a voice frame to be further processed; comparing the energy value with the dynamic threshold, if the energy value is lower than the dynamic threshold, filtering the corresponding time frame as a noise frame, if the energy value is higher than the dynamic threshold, retaining the corresponding time frame as a valid voice frame; encoding the time frame retained after filtering by the dynamic threshold to generate the final game team voice signal. The present application can reduce the phenomenon of missed or misjudgment of noise, realize dynamic and accurate filtering of noise under different environmental noise conditions, and improve user experience.

The invention relates to the technical field of anti-eavesdropping protection, and particularly discloses an intelligent anti-eavesdropping protection method based on quantum communication, and the method comprises the following steps: S1, obtaining the environment decibel and use decibel data of a user in real time in a set interval, and analyzing the tolerance range threshold and hearing sensitivity of the user; s2, caching the received signal when a user uses the equipment, monitoring the current environment decibel during playing, predicting the current use decibel of the user, and generating an initial interference sound wave in combination with a tolerance threshold; s3, adjusting an interference sound wave waveform according to the amplitude of the cache signal, and if an eavesdropping behavior is detected, synchronously outputting an adaptive interference sound wave while playing the cache signal to realize dynamic protection; according to the method, customized interference sound waves are dynamically generated by quantifying user hearing features and environment data, eavesdropping is effectively resisted, and communication safety is guaranteed.

The invention relates to an equipment control method and device and a storage medium. The equipment control method comprises the following steps: determining that first equipment making a sound during working is in a working state; based on the real-time signal strength of a communication connection signal between the first equipment and second equipment, controlling the first equipment to send a sound decibel value matched with the real-time signal strength; wherein the sound decibel value corresponding to the first signal intensity is smaller than the sound decibel value corresponding to the second signal intensity, and the first signal intensity is larger than the second signal intensity. According to the invention, the sound generated during the operation of the equipment is prevented from influencing the user, and the user experience is improved.

This invention relates to a method, equipment, and medium for reducing noise during water pumping, and particularly to the field of water pumping noise reduction technology. For each pumping operation to be performed, the current air pressure data generated in the inlet hose when the water pump is operating at a preset power is collected. Based on the current air pressure data, the current decibel value of the sound generated by the inlet hose disturbing the water source when the water pump is operating at the preset power is determined. It is then determined whether the current decibel value meets a preset requirement. If the current decibel value does not meet the preset requirement, the current decibel value is adjusted and reduced to the air pressure change value required to meet the preset requirement. The inlet hose is pressurized according to the air pressure change value, and the disturbance of the inlet hose is reduced, so that the current decibel value meets the preset requirement. This prevents the inlet hose from disturbing or shaking in the water source area, avoiding noise generated by the inlet hose shaking in the water source area, thus achieving the noise reduction function.