88 results about "Sound level meter" patented technology

A system for evaluating an ear seal between an earphone of a hearing device and an ear canal includes a first transducer configured to play a sound in response to an electrical signal including a reference frequency component and a test frequency component below the reference frequency. A second transducer receives the sound in the ear canal. A controller is configured to calculate at least one electrical signal level difference between the reference frequency component and the test frequency component of the electrical signal, measure the sound levels of the reference frequency component and the test frequency component of the sound in the ear canal, calculate an acoustic signal level difference between the measured sound levels of the reference frequency component and the test frequency component, calculate a normalized acoustic difference value by subtracting the electrical signal level difference from the acoustic signal level difference, and determine a measurement result of the ear seal based on the normalized acoustic difference value.

The present invention relates to the technical field of data processing, and particularly relates to a signal analysis method for an electronically controlled single-cylinder diesel engine. The method includes: obtaining the vibration amplitude regularity and the vibration change amplitude at a moment; obtaining the abnormality degree of the vibration amplitude at each moment according to the difference between every two adjacent elements in the vibration change amplitude sequence at each moment and the vibration amplitude regularity at each moment; obtaining the optimized abnormality degree of the vibration amplitude at each moment according to the vibration amplitude corresponding to each moment in the judgment sequence of the vibration amplitude at each moment and the vibration amplitude regularity; obtaining the true vibration amplitude sequence of each vibration sensor; further obtaining the true sound pressure sequence of each sound level meter; and analyzing the true vibration amplitude sequence and the true sound pressure sequence of any vibration sensor and sound level meter to obtain the fault type of the single-cylinder diesel engine. The present invention can accurately eliminate noise and accurately obtain the fault type of the single-cylinder diesel engine.

The invention provides an inspection behavior monitoring method and system for a mobile sound level detection device, the method and system are applied to a sound level meter with a Bluetooth module and a portable mobile intelligent terminal, and the portable mobile intelligent terminal responds to a detection request initiated by an inspector and judges the legality of the detection request; when it is judged that the inspector has the corresponding authority and it is judged that the current position information is matched with the target position information, the portable mobile intelligent terminal is controlled to establish Bluetooth communication connection with the credit-granted sound level meter; and the portable mobile intelligent terminal acquires data currently detected by the sound level meter as monitoring data in a Bluetooth mode. Through the Bluetooth function of the sound level meter, a portable mobile intelligent terminal (such as a mobile phone) of an inspector is bound and biological information authentication is carried out, so that other people can be prevented from illegally using the sound level meter for replacement; and positioning monitoring is carried out through a positioning function, so that behavior monitoring of the user can be better carried out.

The application discloses a kind of for multi-scene adaptive power equipment intelligent inspection system, it is related to power equipment inspection field, wherein scene voiceprint modeling module is generated by laser radar scanning scene three-dimensional model and labels equipment identity data, and audio signal is collected to equipment, after extracting spectral feature, it is clustered, and it is constructed initial voiceprint model to remove anomaly;Adaptive learning module obtains real-time temperature with temperature sensor, calculates temperature influence coefficient and correction value, and obtains voiceprint baseline model by correcting initial model and is regularly updated;Inspection positioning module obtains the coordinates and attitude of inspection equipment, calculates its distance with equipment, azimuth angle, and generates predicted synthetic voiceprint data according to formula;Abnormality identification module compares real-time voiceprint data with prediction data, and identifies anomaly outside fluctuation range, and controls inspection equipment to move positioning abnormal equipment according to distance.The system solves the problem of multi-device sound source interference and temperature influence, and improves the reliability and abnormal positioning efficiency of inspection.

The invention provides a vibration noise detection device and method of a wall breaking machine, and mainly relates to the field of vibration noise detection. A vibration noise detection device of a wall breaking machine comprises a positioning mechanism arranged in a detection chamber and a plurality of noise detection mechanisms, coaxial placement and height adjustment of the wall breaking machine are achieved through clamping and positioning of the positioning mechanism, and the wall breaking machine can be located at the detection height on different workbenches. At least four noise detection mechanisms are arranged, each noise detection mechanism comprises a supporting arm, a supporting cavity is formed in the inner side of the front end of each supporting arm, a telescopic arm is arranged on each supporting cavity in a sliding mode, and a sound level meter and a distance sensor are arranged at the front end of each telescopic arm. The invention has the following beneficial effects: the invention creatively provides a structure and a method for respectively detecting noise by a plurality of workbenches, so that the noise intensity of the wall breaking machine in the daily use process can be more reasonably represented.

The invention relates to a method for measuring the noise reduction effect of a noise reduction damping steel I-steel component. According to the method for measuring the noise reduction effect of the noise reduction damping steel I-shaped steel components, a first sound level meter and a second sound level meter are arranged at the two ends of the two I-shaped steel components in the first direction respectively; the middle of a first flange plate at one end of a first sound level meter of the I-shaped steel component, the edge of the first flange plate in the third direction and the middle of a web are knocked through force application pieces provided with force sensors, and the first sound level meter and a second sound level meter can obtain noise decibels close to a knock point and away from the knock point respectively; average values can be obtained through multiple times of knocking on the same position of the same I-shaped steel component, the difference values of the average values of noise decibels measured through multiple times of knocking on the same positions of the two I-shaped steel components are compared, and data comparison is conducted according to common I-shaped steel components. And evaluating the noise level, namely the noise reduction performance, caused by vibration, impact and the like in the use process of the I-shaped steel member made of the novel material.

The invention relates to the technical field of sound insulation performance testing, and discloses a portable sound insulation performance testing device and a testing method thereof.The portable sound insulation performance testing device comprises a box body, a supporting assembly, a sound production unit, a sound level meter assembly and a dynamic signal tester; the supporting assembly is installed on the box body, a plate to be tested is installed on the supporting assembly, and the box body is divided into a sound source chamber and a receiving chamber; the sound production unit is mounted in the sound source chamber; the sound source chamber and the receiving chamber are internally provided with sound level meter assemblies used for collecting noise signals. And the dynamic signal tester is arranged outside the box body, is connected with the sound level meter assembly through a high-speed signal line assembly, and is used for receiving a signal of the sound level meter assembly. The device is simple in principle, convenient to install and easy to operate, the sound insulation testing efficiency can be greatly improved, and the testing energy consumption and cost are reduced.

This invention discloses an active coupling cavity device and calibration method for calibrating a standard microphone. A sound source adapter is located at the signal input end of the active coupling cavity. A multi-channel sound field distribution structure is located within the active coupling cavity, comprising eight acoustic channels evenly distributed circumferentially along the central axis of the active coupling cavity. A symmetrical clamping assembly constrains the reference microphone and the microphone under test to be symmetrical about the central axis of the active coupling cavity. A coaxiality test ring assembly rigidly constrains the axes of the reference microphone and the microphone under test to coincide with the central axis of the active coupling cavity. The calibration test system includes a signal generator, a sound level meter under test, a preamplifier, a measurement amplifier, a bandpass filter, and a digital voltmeter. The multi-channel uniformly distributed sound field structure solves the problem of uneven sound pressure distribution caused by unidirectional input, and the symmetrical clamping assembly and the coaxiality test ring assembly respectively solve the problem of poor consistency in low-frequency and high-frequency phase measurements.

System for detecting a leak in a water supply system, in particular a water supply system in a building, wherein several consumers can be supplied with water from the water supply system (8) and wherein each of the several consumers, when drawing water from the water supply system (8) - active consumer - emits sound into the water supply system (8), comprising: a flow measuring unit (3) designed to be attached to a supply line (5) of the water supply system (8) and to measure an actual flow rate through the supply line (5), a sound measuring unit (4) designed for attachment to the supply line (5) of the water supply system (8), for measuring sound in the water supply system (8) and for outputting sound measurement values ​​based on measured sound, wherein the sound measuring unit (4) is designed for detecting structure-borne sound, a sound evaluation unit (11) designed to detect active consumers based on sound measurement values, an estimation unit (12) designed to determine an estimated flow rate from the active consumers detected by the sound evaluation unit (11), and an evaluation unit (14) which is trained to compare the actual flow rate with the estimated flow rate and to detect a leak in the water supply system (8) based on a comparison result.

The present invention discloses a fixed multi-functional sound level meter, which relates to the technical field of sound level meters. The fixed multi-functional sound level meter includes a sound level meter housing and a preamplifier installed on the top surface of the sound level meter housing. A test microphone is installed on the top surface of the preamplifier. A fixing mechanism is installed on the outer surface of the sound level meter housing, and a protection mechanism is installed on the outer surface of the test microphone. In the present invention, a bracket structure is formed by the support side plate and the bottom fixing plate. The fixing bottom can be placed on a plane, and the sound level meter housing can be placed on the plane through the bracket structure. The first cylinder and the second cylinder are separated from each other, the first buckle is engaged with the second buckle, and the first buckle is engaged with the second buckle seat, so that the two traction ropes are cross-fixed on the outside of the support side plate, and the inclination angle of the support side plate is fixed, making the installation structure more stable.

The utility model relates to the technical field of tire mute cotton, and provides an automobile tire mute cotton noise reduction effect static detection device which comprises a sound insulation bin, a bin cover and a noise display, the bin cover is hinged to the sound insulation bin through a hinge, and sound insulation cotton is fixedly installed on the inner wall of the sound insulation bin and one side of the bin cover. A sound level meter and an acrylic box are arranged in the sound insulation bin, the acrylic box is located on one side of the sound level meter, the sound insulation bin, a bin cover and sound insulation cotton are arranged, so that the sound level meter and the acrylic box can be located in a completely-closed space, and then different types of road noise are simulated through a loudspeaker; and then the sound intensity is measured through the sound level meter and is displayed on the noise display, so that the noise level when the mute cotton is installed or not installed can be measured and recorded, meanwhile, equipment such as the sound level meter can be prevented from being interfered by the outside, fine noise changes can be accurately captured, and the accuracy of a test result is effectively improved.

The invention discloses a vibration noise reduction and demonstration verification test bed for an underwater glider. The test bed comprises suspension equipment, a swing table, a water tank, a data acquisition analyzer, a vibration acceleration sensor, a force sensor, a hydrophone, an exciting force hammer and a sound level meter, the hydrophone is arranged in the water tank, and the water tank is used for enabling the underwater glider to be immersed in water and testing the wet mode characteristics of the underwater glider; the data acquisition analyzer is connected with the vibration acceleration sensor, the force sensor, the hydrophone and the sound level meter; the exciting force hammer is used for applying preset exciting force to the underwater glider; the underwater glider vibration noise reduction and demonstration verification test bench is used for carrying out vibration noise testing and vibration reduction and noise reduction analysis on an underwater glider in a suspended state under the conditions that the underwater glider is in air and immersed in water and under various operation conditions; the swing table is used for fixing the underwater glider and carrying out swing posture simulation and depth simulation demonstration verification on the underwater glider.

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 an audio data processing method and system, electronic equipment and a storage medium, and the method comprises the steps: calling audio collection equipment to carry out the collection of biological sound audio, so as to obtain to-be-processed audio data; segmenting the audio data to be processed into a plurality of audio clips; calculating a cumulative percentage sound level of the audio clip; calculating the signal-to-noise ratio of the audio clip by using the cumulative percentage sound level; and according to the signal-to-noise ratio of the audio clip, identifying an effective audio clip from the plurality of audio clips. According to the scheme, the collected audio data to be processed are segmented into the plurality of audio clips; the signal-to-noise ratio of the audio clip is quickly calculated through the accumulated percentage sound level of the audio clip, and then the effective audio clip is identified from the plurality of audio clips according to the signal-to-noise ratio, so that the automatic audit of the audio is realized, and the audio audit efficiency and the audio audit accuracy are improved.

To provide a fixed quantity injection type aerosol product for toilet which has lowered injection sound so that it is hard to be noticed by others when using it in a private booth of a toilet, and a method for using the fixed quantity injection type aerosol product for toilet.SOLUTION: A fixed quantity injection type aerosol product for toilet comprises: an aerosol container filled with an aerosol composition containing an undiluted liquid and a jetting agent; and a fixed quantity injection aerosol valve attached to the aerosol container. An injection quantity per one injection is 0.2-0.4 mL, and equivalent noise level for 10 sec with A characteristic in a normal noise meter is 62 dB or lower.SELECTED DRAWING: None

An inclined shaft trackless transportation safety management and control system comprises an inclined shaft lane and a danger avoiding lane, the inclined shaft lane is composed of an uphill lane and a downhill lane, an uphill warning lamp strip is arranged on one side of the uphill lane, a downhill warning lamp strip is arranged on one side of the downhill lane, and a sound level meter, a holder camera and a warning panel are arranged on the side wall of the inclined shaft lane at intervals. A millimeter wave radar is arranged on a vault above an inclined shaft lane, and a vehicle-mounted real-time intercom is arranged on a running vehicle. A plurality of groups of anti-sliding devices are arranged on the hedge lane along the slope trend, a safety indicator lamp is arranged at the entrance of the hedge lane, and a microwave probe is arranged at the tail end of the hedge lane; the trackless transportation safety management and control platform is used for receiving information of the pan-tilt camera, the sound level meter, the millimeter wave radar and the microwave probe, and is connected with a safety indicating lamp and a vehicle-mounted real-time intercom, so that a worker can make a corresponding instruction; and a more perfect inclined shaft transportation safety supervision means is provided, and the driving safety in the inclined shaft can be remotely monitored and managed.

The utility model discloses a multifunctional sound level meter with a portable structure, which relates to the technical field of sound level meters, and comprises a sound level meter body, the top end of the sound level meter body is fixedly connected with a test microphone, the rear end of the sound level meter body is provided with a mounting groove, the outer wall of the sound level meter body is connected with a protection mechanism in an inserted manner, and the sound level meter body is provided with a sound box. A dustproof mechanism is inserted into the rear part of the sound level meter body, and the protection mechanism comprises a protection block. According to the multifunctional sound level meter with the portable structure, when the sound level meter body falls off or falls on the ground, the protection block, the protection strip and the U-shaped buffer block are located outside the sound level meter body, so that when the sound level meter body falls off, the protection block, the protection strip and the U-shaped buffer block are in contact with the ground firstly, and the protection block, the protection strip and the U-shaped buffer block are not in contact with the ground; therefore, direct contact between the sound level meter body and the ground can be avoided as much as possible, damage to the sound level meter body is reduced, and a protection effect is achieved.

The present invention belongs to the technical field of measurement devices and provides a road traffic noise monitoring device, system, and method for using the same. The monitoring device comprises: a frame having three closed sides and one open side, and a plate having one end hinged to one end of the frame and the other end detachably connected to the other end of the frame; a sound level meter detachably mounted on the exterior of the frame; a crawling device, one mounted on each of the three side walls of the frame and the plate, with multiple crawling devices acting together on a longitudinally extending tubular object to enable the frame to be raised and lowered on the tubular object; a control module for controlling the operation of the crawling devices; and a battery module for powering the crawling devices and the control module. The present invention eliminates the need for full staff participation in monitoring, thereby reducing labor costs.

The utility model discloses a sound level meter mounting rack for noise detection, relates to the technical field of sound level meter mounting racks, and aims to solve the problems that a sound level meter of an existing device is inconvenient to mount on a wall or the ground, the angle of the sound level meter is inconvenient to adjust after the sound level meter is fixedly mounted, and the sound level meter is inconvenient to adjust. According to the technical scheme, the sound level meter is characterized by comprising a fixed mounting frame, a rotating shaft is rotatably connected to the interior of the fixed mounting frame, a placement frame is fixedly connected to the interior of the rotating shaft, and a sound level meter body is detachably connected to the interior of the placement frame; a rotating groove allowing the placing frame body to rotate is formed in the fixed mounting frame, positioning screws are in threaded connection with the side wall of the fixed mounting frame, positioning screw holes are formed in the side wall of the placing frame body, and the positioning screw holes are annularly distributed at equal intervals relative to the circle center line of the rotating shaft; and the effects of full detection at different angles, rapid positioning detection and convenient fixation are achieved.

1. Name of the product of this design: Graphical user interface for activating software for electronic devices. 2. Purpose of the product of this design: an electronic device. 3. The key design point of this appearance design product lies in the graphical user interface. 4. The picture or photo that best illustrates the key points of the design: main view. 5. Purpose of the graphical user interface: to remind whether the software is available or supported, such as whether a sound level meter or vibration meter is available or supported. 6. Human-computer interaction of graphical user interface: The graphical user interface can be interacted by clicking icons in the graphical user interface on the screen panel or operating buttons of electronic devices such as sound level meters or vibration meters to perform the next operation such as noise or vibration measurement and analysis.

The invention relates to a method for testing passing noise outside a vehicle. The method is suitable for passing noise testing in the standard of GB1495-2020 Vehicle Accelerated Driving Exterior Noise Limit and Measurement Method. Equipment used in the invention is composed of an in-vehicle data acquisition host and a sound level meter, and is characterized in that a GNSS + IMU inertial navigation module is arranged in the in-vehicle data acquisition host, and the positions of an AA'line and a BB 'line, the speed of a test vehicle and the distance between the test vehicle and the AA'line and the BB' line in the standard of an automobile accelerated running out-of-vehicle noise limit value and measurement method are acquired through the inertial navigation module. The problems of measurement result deviation and data recording asynchronism caused by WIFI signal transmission time delay are solved.

The utility model relates to the field of nylon strip detection, in particular to a new material modified nylon strip sound insulation performance testing device which comprises a sound insulation box, a box cover, a locking part, a sound insulation felt, a mounting plate, a fixing block, a sounder and the like, a box cover is hinged to the top of the soundproof box, a locking part is arranged on the front side of the box cover, the end of the locking part is locked on the front side of the soundproof box, soundproof felts are glued to all the end faces in the soundproof box and the box cover, mounting plates are arranged on the two sides of the inner bottom of the soundproof box, fixing blocks are slidably arranged on the mounting plates, and the fixing blocks are connected with the soundproof box. And a sounder is clamped on the fixed block on one side. According to the utility model, the sound generator and the sound level meter are arranged at relative positions, so that repeated testing can be carried out under the same condition, the accuracy and repeatability of testing results are improved, and accurate measurement of sound insulation performance indexes is ensured.

Thermo-acoustic composite panel. The invention relates to a device comprising, on the one hand, an insulating core comprising recesses (3A, 3B) arranged on at least one face of the core, and on the other hand, a layer of hydraulic binder, covering at least one face of the core and comprising projections of hydraulic binder engaging in, and filling, the recesses arranged on the face of the insulating core. The insulating core (2) comprises from 1 to 100,000 recesses (3A, 3B) per m², preferably between 10 and 100,000 recesses per m2, and the layer of hydraulic binder comprises from 1 to 100,000 corresponding projections (4A, 4B) per m², preferably between 10 and 100,000 corresponding projections per m2. The thermo-acoustic composite panel (1A) has a sound transmission attenuation, measured by a sound level meter according to IEC 61672, of at least 58 dBA. Figure for abstract: Fig. 1

The utility model discloses a transformer sound level measurement auxiliary device, which comprises a plurality of sound level probes used for acquiring sound signals of a transformer, and further comprises a probe bearing frame covering the periphery of the transformer, and the plurality of sound level probes are arranged along the circumferential direction of the probe bearing frame. The sound level probes are located on the same horizontal plane, and the distances from the sound level probes to the outer surface of the transformer are equal. According to the utility model, the problem of inconsistent measurement distances caused by positioning deviation in traditional manual measurement is effectively solved, and the accuracy and reliability of measurement data are ensured; secondly, the sound level meter does not need to be held manually or the position of the measuring head does not need to be adjusted frequently, the electric shock safety risk possibly faced by manual operation under the electrified working condition is greatly reduced, and the personal safety of operators is guaranteed; and multiple measuring points can be measured at the same time, so that the condition of long time consumption of a single test caused by manual switching measurement of multiple measuring points in the prior art is changed, and the detection efficiency is greatly improved.

The utility model discloses a supporting rod for extending a sound level meter, and belongs to the technical field of extending supporting rods. The supporting rod for extending the sound level meter comprises a supporting mechanism and an extending mechanism, the extending mechanism comprises a connecting rod, a connecting base is rotationally connected to the interior of the upper end of the connecting rod, a micro motor is arranged on the outer side wall, close to the upper end, of the connecting rod, the output end of the micro motor is in transmission connection with the connecting base, and one end of the connecting base is connected with an extending base; sliding grooves are formed in the two sides of the inner wall of the extension base, an extension rod is slidably connected between the pair of sliding grooves, a screw is connected to the top end in the extension base through a bearing, one end of the screw is sleeved with a worm gear, a worm is rotationally connected to the position, close to the worm gear, in the extension base, and the worm and the worm gear are meshed with each other. The end, away from the worm gear, of the screw penetrates through the extension rod, extends into the extension rod and is in threaded connection with the extension rod, and the bottom end of the extension rod penetrates through the extension base and is connected with a connecting assembly.

The application discloses a road traffic noise crowd influence measurement method based on mobile phone signaling data, and the method comprises the following steps: acquiring mobile phone signaling data, determining the space-time distribution information of mobile phone signaling users, estimating the actual population space-time distribution according to the space-time distribution information of mobile phone signaling users and local population census data, calculating the residence time of users staying at each base station position according to the population age attribute in the mobile phone signaling data and the population activity characteristics in the actual population space-time distribution, and then determining a target data set; combining the hourly traffic noise map of the city to obtain the hourly traffic noise equivalent sound level of the coverage range of each base station, and calculating the road traffic noise continuous exposure intensity of the target crowd according to the target data set and the traffic noise equivalent sound level. The application has high accuracy and can be widely applied to the field of computer technology.

The utility model discloses a positioning frame for sound level meter installation, which relates to the field of sound level meter positioning frames, in order to solve the problem in the prior art that the distance between the sound level meter and the noise point cannot be adjusted after the sound level meter is fixed in the positioning frame for sound level meter installation. Since the noise level at different positions is related to the distance from the noise point, it is necessary to move the positioning frame when measuring at different positions, which is relatively troublesome. An electric telescopic rod is fixedly connected to the middle of the upper end of the bottom plate, a transmission box is fixedly connected to the upper end of the electric telescopic rod, a circular opening is provided in the middle of the upper end surface of the transmission box, a rotating seat is connected to the upper end of the transmission box, a rotating member is fixedly connected to the middle of the lower end of the rotating seat, a distance adjustment guide rail is fixedly connected to the upper end of the rotating seat, a rectangular groove is provided in the middle of the inner part of the distance adjustment guide rail, a screw is provided in the middle of the rectangular groove, and a sound level meter fixing mechanism is provided at the upper end of the distance adjustment guide rail.

The utility model provides building environment noise detection equipment, belongs to the technical field of building engineering management, and aims to solve the problems that an existing sound level meter needs to be temporarily heightened by means of bricks and other objects in a building construction site to ensure the accuracy of a measurement result, operation is tedious, and extra errors are possibly introduced due to unstable supporting. Comprising a sound level meter body, a palm elastic band, an arm elastic band, a linkage placing assembly and a portable assembly. The two palm elastic bands are fixedly connected to the left side and the right side of the sound level meter body respectively. The arm elastic band is arranged behind the top of the sound level meter main body; the linkage placing assemblies are arranged on the left side, the right side and the bottom of the sound level meter body. And the portable assembly is arranged behind the top of the sound level meter main body. According to the utility model, the sound level meter main body can be magnetically attracted on an iron building structure and is matched with the three-legged telescopic support frame, so that the sound level meter main body adapts to detection operation in various complex environments, and the sound level meter main body can be fixed on an arm, so that the operation safety is guaranteed.

The utility model discloses a detection device for environmental engineering, which belongs to the technical field of environmental engineering, and comprises a sound level meter, the rear side of the sound level meter is movably connected with a split type disassembly and assembly mechanism, the rear side of the split type disassembly and assembly mechanism is movably connected with a flexible fixing mechanism, and the flexible fixing mechanism is movably connected with the sound level meter. The contradiction between portability and practicability of traditional long-time detection equipment can be solved, the problem that a traditional support is large in size and inconvenient to carry is solved by overturning and storing the clamping rods to the inner side of the fixed bottom plate and fixing the clamping rods through magnetic attraction, the portability is greatly improved, and an electronic telescopic rod is matched with a rotary knob to drive the clamping rods to conduct bidirectional clamping. The device can be rapidly installed on various carriers such as lampposts and trees without additional tools, traditional installation point position limitation is broken through, clamping rod lines enhance friction force, a ratchet and pawl structure locks a knob to prevent looseness, the installation stability in severe weather is effectively improved, the device is integrally compatible with various carriers such as wooden and metal rod bodies, and the installation cost is reduced. And the application scene of long-time detection is expanded.

An IoT Smart Sound Level Meter that is connected through the internet via ethernet cable, wifi or cellular network. The IoT Smart Sound Level Meter measures and monitors sound pressure levels. Sound pressure levels are measured in decibels. The sound pressure level data that is sent via the internet through ethernet, wifi or cellular network to cloud servers where the data is stored and saved. The cloud servers are connected to Application Programming Interfaces (API) connected to web-based software that converts the sound pressure level data into decibel measurements. These measurements are displayed to the end-user through the web-based software and / or application providing real-time decibel level measurements and historic sound pressure level recordings. The web-based software and / or application provides access to view decibel measurement data remotely from a computer, laptop, tablet, smart watch, or mobile device.