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A lavalier microphone is a type of microphone. There are two types of microphones: condenser microphones and dynamic microphones. Is a lavalier microphone a condenser microphone or a dynamic microphone best lavalier microphone ?


Condenser microphones are microphones that require power. It has the characteristics of high definition and high sensitivity, and the sound quality is full and thick without turbidity; the moving coil microphone does not need DC working voltage, and the sound signal is mainly generated by the coil closely connected with the diaphragm. , according to the change of sound pressure in the magnetic field to complete the continuous movement, has the characteristics of rich, plump, strong anti-noise ability.


Generally speaking, lavalier microphones have both condenser and dynamic microphones because they are placed relatively close to the sound source. However, most lavalier mics are condenser mics, as dynamic mics have low volume and dull vocals. , the lack of clarity, sensitivity and other shortcomings.


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# by casnerdarin | 2022-08-18 12:48 | hobby | Comments(0)

With the continuous and stable development of the real economy, the demand for logistics in all walks of life has grown rapidly, and accordingly, more and more logistics and transportation companies have emerged in the market. air freight forwarding Logistics companies do not know how to choose


1. Transportation resources

Rich transportation resources and perfect service network are important factors to ensure the smooth completion of transportation tasks. Therefore, when we choose a logistics company, we need to understand their transportation mode, performance, type, etc. in detail.


2. Service Quality

Logistics companies belong to the service industry, and the quality of service is directly related to whether the goods can arrive at the designated location safely, timely and accurately. Therefore, when choosing a logistics company, service quality needs to be the focus of inspection.




# by casnerdarin | 2022-08-17 12:52 | freight | Comments(0)

Grain retention and grinding resistance determine the speed of self-sharpening:


The holding force of abrasive particles is greater than the grinding resistance → → self-sharpening is slow


Retention of abrasive grains < grinding resistance → → self-sharpening is fast


The retention force of the abrasive particles plays a key role in the hardness of the binder, and the pores will also have a certain influence. abrasive manufacturer The factors affecting the resistance of grinding are more complex, the shape characteristics of the abrasive particles, the material, hardness, and grinding conditions of the grinding workpiece. All will cause different grinding resistance. Not fast or slow is the best



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# by casnerdarin | 2022-08-16 14:45 | technology | Comments(0)

A recollection foam bed is actually a bedding produced from recollection foam.cool gel memory foam mattress Recollection foam bed means a mattress created from recollection foam, also called gradual rebound sponge, inert sponge, zero tension sponge, space sponge.

They have the features of decompression, sluggish rebound, heat sensing, ventilation, antibacterial and anti-mite. This bedding can absorb and break down the body's strain. Based on the modifications in the solidity of our body, it can precisely condition the body curve without any anxieties. Pressure match, when offering our bodies powerful assistance.

Medically confirmed, it may effectively ease musculoskeletal ache, help in dealing with cervical and lumbar spinal column troubles, decrease sleeping disorders such as heavy snoring and overturning, lengthen serious rest time, and improve sleep quality.






# by casnerdarin | 2022-08-12 16:37 | mattress | Comments(0)

The interference of rainproof led power supply is generally divided into two categories: one is the interference caused by the internal components of the switching power supply; the other is the interference caused by the switching power supply due to the influence of external factors. Both involve human and natural factors.


Internal interference of switching power supply: EMI generated by switching power supply is mainly caused by high-order harmonic current interference generated by basic rectifier and peak voltage interference generated by power conversion circuit.


Basic rectifier: After the power frequency AC sine wave is rectified, it is no longer a single frequency current, and the transmission line produces conducted interference and radiation interference


Power conversion circuit: The power conversion circuit is the core of the switching regulated power supply. It is rich in harmonics. The main components that produce this pulse interference are:




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# by casnerdarin | 2022-07-29 14:39 | technology | Comments(0)