A gun could have a silencer. They both reduce the sound. This thing fell off from my car on Tuesday. I didn't know how to explain it to my friend. English US Hindi Kannada. Silencer on my bike marked in red. The one learning a language!
Learn about premium features. Tired of searching? HiNative can help you find that answer you're looking for. This is known as destructive interference. Where the peaks of sound-waves cancel each other out - just like in noise cancelling headphones. There are three main types of muffler, and the most common by far is a design known as a turbo muffler or reverse muffler.
Exhaust gases enter on one side of the muffler, travel through a series of pipes and chambers, and then exit through the other side. The gases typically travel in an S-shape on their way through the muffler. Along the way there are perforations in the pipes which allow the gas and sound waves to enter a chamber.
The perforations are specific sizes and are engineered to break up the sound waves. The chambers are made up from a series of baffles which are spaced to coincide with certain frequencies of sounds. As the sound waves reflect around inside these chambers, they will collide and cancel each other out using destructive interference. A turbo muffler is very effective at silencing but this comes at the cost of restricting the exhaust gas flow as it makes its way through the system.
This causes a small amount of back pressure. Generally back pressure is undesirable in an exhaust system - especially for naturally aspirated engines that rely only on suction to pull air and fuel into the cylinder. With back pressure present, a part of the exhaust gas will remain in the cylinder after the exhaust stroke.
On the next intake stroke, this exhaust gas takes up space intended for fuel and air - so there is less material to burn and the engine is less efficient than it could be.
In addition, the exhaust gas that remains is hot and causes the intake charge to heat up - reducing its density and meaning that there is even less fuel and air in the cylinder for combustion. This is less of an issue on forced induction - turbo-charged and super-charged - engines because the intake charge is forced in under pressure. From the outside, a chambered muffler looks identical to a turbo muffler, but it's internals are simpler. Instead of the gas traveling in an S-shape, it travels directly from one side to the other through a series of chambers and baffles.
A chambered muffler is less restrictive on the flow of exhaust gases, giving minimal back pressure and so this design is found on performance vehicles and in the aftermarket. It has less of a silencing effect on the exhaust and gives a deep rumbling sound.
The original design of muffler is a straight through muffler. It's seen on hot rods or at the side of classics like the AC Cobra. In this design a perforated pipe runs straight through the muffler, wrapped in sound absorbent fibre-glass like rockwool.
In the process of transmitting the exhaust gas to the outside of the car, the engine produces noise. This will vary across different cars, so the muffler is designed specifically for each. So both the exhaust and the muffler are part of a system involved in reducing the byproducts of the internal combustion process. Both play a vital role in ensuring that our cars are safe and that any environmental impact is reduced.
If you need to book a muffler or exhaust service, get in touch with us now! Exhaust: the gas controller The exhaust system in your car consists of piping and components that guide the gasses produced by an internal combustion process in the engine.
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