36 results about "Decibel meter" patented technology

The invention provides a method of adjusting a ring tone volume, applied to a communication terminal which comprises a loudspeaker, a communication unit, a decibel meter and a signal conversion unit. The method comprises the steps of: when the communication unit of the communication terminal receives an incoming call signal, waking up the decibel meter; the decibel meter measuring the sound pressure level of surrounding environment noises of the communication terminal; the signal conversion unit converting the sound pressure level of surrounding environment noises into a ring tone volume data value corresponding to the sound pressure level; and generating a control signal to control the loudspeaker to release a ring tone according to the ring tone volume data. In addition, the invention provides a system of adjusting a ring tone volume. The system and method can automatically adjust a ring tone volume according to surrounding environment noises.

A container data center includes a portable container, server cabinets, a decibel-meter, fans to cool the server cabinets, fan controlling systems to speed up or slow down the fans, an air conditioner to adjust a temperature inside the container, and a temperature adjustment system to receive a decibel level sensed by the decibel-meter. The temperature adjustment system compares the value of the received decibel level with a preset value. If the value of the received decibel level is greater than the preset value, the temperature adjustment system decreases the temperature of air outputted by the air conditioner, thereby the fan controlling systems slowing down the fans. If the value of the received decibel level is not greater than the preset value, the temperature adjustment system increases the temperature of the air outputted by the air conditioner, thereby the fan controlling systems speeding up the fans.

The invention discloses a novel environment monitoring device, which comprises a control box body, the interior of the control box body is provided with a partition, and the inner bottom surface of the control box body is provided with a storage battery, a processor, a storage device, a WIFI connector and a /D converter, the storage battery, processor, storage, WIFI connector and A/D converter are located under the partition, and the center of the upper surface of the partition is equipped with an electric telescopic rod, which can drive the two The upper end of an L-shaped connecting frame is opened, and drives the connecting seat to move upwards, so that the temperature sensor, dust sensor, humidity sensor and decibel meter extend out of the control box. In rainy days, water can be prevented from entering the control box, effectively The electrical components are protected. The new environmental monitoring device has a simple structure and is easy to operate. It can not only protect the electrical components, but also make the service life of the device longer, and does not affect the detection results of the electrical components.

A container type data center comprises a box body, a plurality of servers arranged inside the box body, a decibel meter which is arranged inside the box body and used for sensing a decibel value inside the box body, a plurality of cooling fans used for dissipating heat of the servers, a plurality of fan control systems used for control rotation speeds of the cooling fans, a cooling device and a temperature adjustment system. The temperature adjustment system is used for receiving the decibel value sensed by the decibel meter and comparing the obtained decibel value with a preset decibel value, when the obtained decibel value is larger than the preset decibel value, the temperature adjustment system turns down temperature of the cooling device, and then the fan control systems are enabled to turn down the rotation speeds of the cooling fans. When the obtained decibel value is equal to or smaller than the preset decibel value, the temperature adjustment system turns up the temperature of the cooling device, and then the fan control systems are enabled to turn up the rotation speeds of the cooling fans. The container type data center can reduce noise. Further provided is a noise reduction method of the container type data center.

The invention discloses a device and a method of testing sound insulation and noise reduction of a wall material. The device comprises a base, an outer box, an inner box, a noise source, a first decibel meter and a second decibel meter, wherein the outer box, the inner box, the noise source, the first decibel meter and the second decibel meter are all put on the base, the inner box is arranged inthe center in the outer box, the top of the outer box is provided with a through hole, a to-be-tested wall material is coated on the inner wall of the inner box, the noise source is put in the centerin the inner box, the top of the inner box is provided with a handle, the handle penetrates the through hole and exposes out of the outer box, the first decibel meter is arranged between the outer boxand the inner box, the second decibel meter is arranged outside the outer box, and distances from the first decibel meter and the second decibel meter to the noise source are equal. The device of testing sound insulation and noise reduction of the wall material can test sound insulation and noise reduction of the wall material quantitatively, shows sound insulation and noise reduction of the wallmaterial in a data form, and is simple. The test method is easy to operate, is low-cost, and can detect a large quantity of samples rapidly and stably.

The invention discloses an autoclaved aerated concrete block performance testing device. The autoclaved aerated concrete block performance testing device comprises a test box and a control box, and is provided with a digimite and a decibel meter; the test box comprises a box body composed of aerated bricks; the box body is provided with an upper opening structure; a concrete block and an aerated brick block are arranged at the opening of the upper opening structure in parallel so as to form a sealed cavity together with the box body; a thermocouple, a buzzer, and a heating device are arranged in the sealed cavity; the control box is arranged on the test box; a master control circuit is arranged in the control box; and a power switch, power regulation rotary knob, a temperature display module, and a sound volume control module are arranged on the outer wall of the control box. The structure of the autoclaved aerated concrete block performance testing device is simple; operation is convenient; and the autoclaved aerated concrete block performance testing device can be used for thermal insulation and sound insulation performance testing of autoclaved aerated concrete blocks.

The invention discloses a door and window sound insulation performance detection apparatus, comprising a casing, a loudspeaker, an output power adjustable amplifier, a signal generator, a first decibel meter, a second decibel meter and a computer. The casing comprises a sound source chamber, a detection plate and a reception chamber which are connected in sequence. Through the first decibel meter in the sound source chamber and the decibel meter in the reception chamber, the sound intensity of the two chambers can be measured at the same time, readings of the first decibel meter in the sound source chamber and the decibel meter in the reception chamber are subtracted to obtain the sound insulation performance of a to-be-detected building door and window. The detection apparatus is small in occupation space, movable, and convenient to detect. No dimension limit is required for a to-be-detected test piece. The test step is simplified and free from influences of human factors. The measurement result is more precise.

The invention provides equipment for precisely measuring the output quantity of carbon powder, and belongs to the field of carbon powder box testing devices. The equipment comprises a base, a carbon powder box fixing frame, a motor fixing frame, a motor, a torsion sensor, a decibel meter and a transmission shaft. The carbon powder box fixing frame comprises a bottom plate, a vertical barrel, a rear plate, two connecting shafts and a front plate. The bottom plate is horizontally fixed to the rear end face of the base, the vertical barrel is vertically fixed to the upper surface of the bottom plate, a sleeve is fixed to the rear end face of the rear plate, and the vertical plate is sleeved with the rear plate through the sleeve. The two connecting shafts are sleeved with two fixing rings. Through the cooperation of the motor, the torsion sensor, an electronic scale and the decibel meter, the device can simultaneously detect torque from the device to the carbon powder box, the quantitiesof the carbon powder output under different kinds of torque, and the volume of sound given when the carbon powder box works at different rotating speeds. The measuring working efficiency is improved,and measured parameters better reflect the quality of the carbon powder box.

The invention relates to automatic light music equipment. The automatic light music equipment comprises an automatic sound test decibel meter, a music module, starting equipment and stopping equipment, wherein when through the test of the decibel meter, the decibel of sound is higher than the normal decibel, the starting equipment ensures the music module plays relax, happy and melodious music; and when the decibel of the surrounding sound is lower than or equal to the normal decibel, the stopping equipment turns off the music module. The automatic sound test decibel meter is any decibel meter sold in the market; the music in the music module can be set by a manufacturer in advance or stored by a user or downloaded by the user from the Internet; and the music module can be used as a player independently. The automatic light music equipment has a novel idea and ingenious design, achieves good effects of relieving stress and easing mood of people in a nervous and restless urban environment and avoids some unnecessary undesirable phenomena such as disputes, quarrels and the like at the same time, and plays a great role in creating a harmonic society.

The invention relates to an intelligent crutch, comprising a crutch body, a voice device, a radar speed measuring device, an infrared ranging device, a decibel meter, an LED lamp device and a controldevice. The intelligent crutch provides lights for walking at night by installing LED and give out alarm light when in danger. The decibel instrument on the crutch promptly reminds users of the noisyenvironment and the need to be vigilant. Infrared sensors and radar velocimeters can detect the road conditions in a timely and sensitive manner, and send out voice prompts, so that it is more convenient to master safe routes when traveling on roads.

The invention discloses a multifunctional integrated advertisement bus station board device. A vertical installation board is fixed on a base and has an advertisement area, a clock fixing area, a hygrothermograph fixing area, a decibel meter fixing area and a bus electronic board installing area, wherein the advertisement area is located in the middle of the installing area, and an LED advertisement screen, a poster advertisement and a light box advertisement are installed in the advertisement area from top to bottom in sequence; the clock fixing area, the hygrothermograph fixing area and the decibel meter fixing area are located on the left of the installation board, a clock is fixed in the clock fixing area, a hygrothermograph is fixed in the hygrothermograph fixing area, and a decibelmeter is fixed in the decibel meter fixing area; the bus electronic board installing area is located on the right of the installation board, and a bus electronic board is fixed in the bus electronic board installing area. By means of the multifunctional integrated advertisement bus station board device, people waiting for buses can know the bus arriving situation and real-time temperature, humidity and noise in real time and can also appreciate different advertisements when waiting for the buses, and the good advertising purpose is achieved.

The invention discloses a vehicle silencer with a multi-stage silencing assembly. The vehicle silencer comprises a silencer main body, wherein a sound inlet pipe and an oil blocking tank are arrangedon the outer surface of one side of the silencer main body, and the outer surface of one side of the oil blocking tank is fixedly connected to the outer surface of the other side of the sound inlet pipe; a decibel meter is fixedly connected to the outer surface of the front end of the oil blocking tank; and a first-stage silencer and a second-stage silencer are fixedly connected to the outer surface of one side in the silencer main body, the first-stage silencer is located on one side of the second-stage silencer, and a flange disc is movably connected to the outer surface of one side of the second-stage silencer. The vehicle silencer disclosed by the invention is provided with the oil blocking tank, the flange disc and the decibel meter and can be used for collecting a small amount of gasoline leaked during the working of an engine, so that the situation that gasoline enters the silencer is prevented; and the silencer can be very conveniently detached to be inspected, and the normal state or abnormal state of the engine can be judged according to the sound of the engine, so that the vehicle silencer has relatively good use prospects.

The invention provides a motor performance testing device, which includes a detection platform, a first bracket, a motor fixing table, a rubber pad, a shock-absorbing cavity, a shock-absorbing spring, a second bracket, an infrared temperature detector, a third bracket, and a decibel meter; The motor fixing table is arranged on the top of the detection platform through the first bracket, and the top of the motor fixing table is provided with a rubber pad, and the rubber pad is provided with several vertically extending shock-absorbing cavities, any shock-absorbing cavity Shock absorbing springs extending in the same direction are arranged in the cavity; the infrared temperature detector is set on one side of the detection platform through the second bracket, the decibel meter is set on the other side of the detection platform through the third bracket, and the infrared The heights of the temperature detector and the decibel meter are higher than the height of the detection platform. The invention has the beneficial effects of simple structure, low manufacturing cost and high reliability of measurement results.

The invention belongs to the field of experimental devices and relates to a music intervention device and method in cell experiments. A loudspeaker in the music intervention device is located on a bottom layer of a CO2 constant temperature incubator, a water channel is arranged on the side surface of the loudspeaker, a non-woven fabric in a non-woven fabric cell plate suspending device is fixed inthe CO2 constant temperature incubator through an inelastic rope, and a decibel meter is placed in the center of the non-woven fabric in use and is used for determining a decibel value of the loudspeaker; and after a relation between a displayed value of the decibel meter and the volume of the loudspeaker is recorded, the decibel meter is taken out, a cell culture container is placed in an up-down vertical relation with the loudspeaker, and the volume of the loudspeaker is adjusted under an aseptic condition so as to carry out music intervention on cells. The device is simple in structure andconvenient to use; physical vibration caused by a loudspeaker box to the cells is reduced in a vertical suspension manner, and meanwhile, the cells is uniformly subjected to music intervention, so that the interference of irrelevant factors can be eliminated, and the validity of experimental intervention conditions can be guaranteed.

The present invention provides a drag grinding test bench for locomotive main axle detection. The drag grinding test bench comprises a horizontally-arranged base, a main axle mounting stage and variable frequency motors; a main axle, wheel axles and gear boxes are provided with temperature sensors respectively; the temperature sensors are connected with a temperature display screen; the main axle,the wheel axles and the gear boxes are provided with noise decibel meters respectively; and the noise decibel meters are connected with a noise display screen. The drag grinding test bench of the present invention can be used for simultaneously detecting the main axle, the wheel axles and the gear boxes, is low in cost, good in detection effect, can measure temperatures and noises, perform detailed detection and easily judge fault points. According to the drag grinding test bench, the operating conditions of the variable frequency motors are controlled through a motor synchronous controller,so that the rotation speeds of the variable frequency motors are synchronous and can be adjusted, and therefore, temperatures and noises under different operating conditions can be detected.

The invention relates to the technical field of medical equipment, in particular to an arteriovenous fistula blood flow sound tester. The arteriovenous fistula blood flow sound tester comprises a decibel meter, wherein the decibel meter comprises a microphone, a display screen and a press button; the microphone of the decibel meter is connected with one end of a sound transmission pipe; and the other end of the sound transmission pipe is connected with a sound auscultation cylinder. By adoption of the above structure, the arteriovenous fistula blood flow sound tester provided by the invention can prove blood flows successfully by detecting that the decibel of the sound of blood flow passing through an arteriovenous fistula is increased in a certain range; if the decibel is reduced, pipe blockage is possible, and the reason should be analyzed as soon as possible and intervention is given, so that pipe blockage is prevented, and the pain of a patient and economic loss are reduced; in addition, the arteriovenous fistula blood flow sound tester is convenient to popularize on a large scale and has huge economic benefit.

The invention discloses an intelligent monitoring device of an electric furnace. The intelligent monitoring device comprises the electric furnace, and a function key and a display screen are arrangedon the electric furnace; one end of the electric furnace is connected with a flexible hose, and the flexible hose is externally sleeved with a detection cylinder; the detection cylinder is composed ofa shell, a top cover and a bottom cover, wherein the shell, the top cover and the bottom cover are of a double-layer structure; a cavity is formed between the outer layers and inner layers of the shell, the top cover and the bottom cover, the cavity is subjected to vacuum treatment, and sealing rings are correspondingly arranged between the top cover and the hose as well as between the bottom cover and the flexible hose; and a decibel meter is arranged on the inner wall of the detection cylinder, a controller is arranged on one side of the decibel meter, and an alarm is arranged on the outerwall of the detection cylinder. According to the intelligent monitoring device of the electric furnace, the flexible hose is externally sleeved with the detection cylinder, the decibel meter is arranged on the inner wall of the detection cylinder, when the fuel gas leaks, the corresponding sizzling noise is generated, then the decibel meter detects that the sound decibel inside the detection cylinder is within a set range, so that the alarm makes a sound, people are reminded of the gas leakage to make timely processing, and major accidents are avoided.

The invention discloses a power supply base station and sound environment detection integrated device. The device comprises a bottom plate; a communication device and a storage battery are fixedly installed on the outer surface of one side of the upper end of the bottom plate; the communication device is located on one side of the storage battery; a decibel meter is fixedly installed on the outersurface of the other side of the upper end of the bottom plate; threaded rods are arranged on the outer surfaces of the front side and the rear side of the bottom plate; and a top plate is arranged atthe upper ends of the threaded rods. The power supply base station and sound environment detection integrated device is provided with the decibel meter, a first listening head, a second listening head, the threaded rods and threaded rings; a power supply base station and a sound environment detection device can be integrated, so that continuous use can be facilitated; detection points of the first listening head and the second listening head can be added, so that various numerical values can be obtained, and a mean of the numerical values is more accurate than the value of a single detectionpoint; and the integrated device also can be better fixed on the uneven ground, so that a better application prospect is brought.