What is a silencer used for? Do indoor silencers work

A muffler is a device in an aerodynamic duct system that controls the airflow to propagate noise along the duct or radiate noise from the opening to the outside, while affecting little or no airflow through it. According to the different acoustic properties, it can be divided into resistive mufflers, resistant mufflers, impedance composite mufflers, microperforated plate mufflers, small hole diffusion mufflers and interference mufflers. The resistive muffler uses the sound-absorbing material laid in the airflow channel to absorb sound energy and play a silencing role, which is effective in eliminating medium and high frequency noise; The resistant muffler is a mutation that causes sound waves in certain frequency bands to reflect echo sources through the mutation of the pipe cross-section. The micro-perforated plate muffler uses a metal micro-perforated plate instead of a sound-absorbing material, which can absorb a wide range of noise. The small hole diffusion muffler is used for the elimination of spray air flow noise; Interference anechoic is the result of superposition of sound propagating in two tubes of half a wavelength of phase difference.

It is a device that prevents sound propagation and allows air flow to pass through, and is an important measure to eliminate aerodynamic noise. The silencer is a noise reduction device installed on the airflow channel of aerodynamic equipment (such as blowers, air compressors, boiler exhaust ports, generators, water pumps and other equipment with high noise from exhaust ports) or in the intake and exhaust systems.

Sheet shearing equipment: one ordinary shearing machine, or one vertical and horizontal shearing machine [multiple sheets can be cut at the same time, fast speed].

2. Bottom, cover, inner baffle, equipment: two punches or hydraulic presses, and one set of molds.

3. Barrel body forming equipment: round barrel [one round forming machine], special-shaped barrel [one forming machine] Fourth, barrel body sewing equipment: one folding machine [for middle seam occlusion], one rolling mouth and rolling machine [for rolling after middle seam occlusion, with imprint requirements with rolling] automatic straight seam welding equipment.

5. Barrel body flanging equipment: a double-end flanging machine [after flanging, it bites and curls with the bottom and cover] 6. Barrel body sealing equipment: a double-end sealing machine or a single-end sealing machine [used to bite after flanging the bottom cover] 7. Exhaust pipe equipment:

One pipe cutting machine [for pipe blanking], one pipe end forming machine [for users who have special requirements for tail gas pipes for high-grade muffler products, such as inner curling, outer curling, bevel curling, special-shaped crimping, pipe expansion, pipe shrinking, etc.], and a pipe bender.

The silencer is to hinder the transmission of sound, and the role is to reduce noise pollution.

Avoid noisy appliances.

Indoor silencers worked.

Of course, the room silencer has some effect, of course, everyone should pay attention to some when using it. Because if carbon deposits are not noticed during use, it will cause insufficient combustion of gasoline, and then there will be shaking in the process of use.

That is, when everyone is in use, they must operate correctly, and only after the correct operation can the effect of the silencer be brought into full play, so that after use, the whole room can become very quiet.

Room silencer has a variety of characteristics, we must meet the requirements of fire prevention, moisture prevention, corrosion prevention and cleanliness when choosing to use, so that some problems can be avoided in the future use process.

Of course, it is necessary to determine the appropriate installation space, and then install and use it in combination with the spectrum characteristics of the noise source, so that the natural sound attenuation of the system can be achieved, so as to achieve the effect of sound reduction. In addition, the louder the volume reduction of the silencer, the greater its pressure loss, and the higher it will be in terms of **, which is also something that everyone should pay attention to when purchasing.

The ** of the room silencer is also high and low, and when you buy, you still have to carefully and seriously compare the ** level. Of course, under the premise of quality assurance, the lower the better.

Room silencers also have a variety of different specifications and models, you need to combine your own actual situation, to buy the right specifications and models, and only in this way can you use it normally after purchasing.

Room silencers are also divided into a variety of different brands, when you buy, you still have to see if the room silencer has the corresponding certificate. Only those with the corresponding qualification certificate are the products that have passed the quality test.

Muffler principle:For air flow pipes with noise propagation at the same time, noise reduction devices such as pipes and elbows with sound-absorbing linings or pipes with sudden changes in cross-sectional area and other sound impedance discontinuities can be used to attenuate or reflect back the noise in the pipes.

There are many types of mufflers, but the muffler mechanism can be divided into six main types, namely resistive mufflers, resistant mufflers, impedance composite mufflers, micro-perforated plate mufflers, small hole mufflers and active mufflers.

Structure:

Depending on the space under the car, the muffler cover can be machined into a tile shape or rolled into a pot. The outer cover of the pot muffler is to shape the outer cover material with a round mandrel and snap it together or install it as a whole with a welded connection, and the welded parts are loaded into the interface. The pot muffler consists of an inner tube, a steering elbow and an intermediate base plate, after which the outer base plate is connected to the outer cover by slotting or welding.

When the space under the car is complex and it is difficult to install a pot muffler, a deep-drawn tile muffler can be used. It can be made in almost any form. The total volume of the muffler for the car is 8 times 12 times the engine displacement.

In reality and in the movies, we can see a device that often appears in silencers, and only a small sound is heard before the enemy falls.

The sound of the firearm is so loud that it is impossible to make it completely inaudible. For example, the sound of bullet ejection and ballistic explosion, and the sound of high-speed impact of various internal parts when the firearm is fired are also not small, and it is difficult to eliminate.

The principle of the muffler is to let the gunpowder gas in the barrel, first expand and then release slowly, it only solves the problem of reducing the blasting sound and fire after the bullet is discharged.

In fact, the silencer can control the sound of a good pistol very quietly, and it is possible that the sound of shooting cannot be heard from a few meters away in a loud **.

But it doesn't mean so much to other series of guns such as sniper rifles.