If take off the sound attenuation in the car's exhaust bearing, what circumstance?

Deadened the noise of exhaust pipe with the bearing? That should be a silencer. The effect of the exhaust muffler is to reduce the exhaust noise. Normal machine exhaust is a certain energy, common exhaust pressure in 0. About 5 million mpa, the exhaust temperature of 700 degrees or so, and exhaust is a certain distance of time, is intermittent, so a machine exhaust on the exhaust pipe with a certain pressure, pulse, if without a muffler disposal, then the noise is big! Pictured above is the exhaust muffler internal figure, can see a machine exhaust gas passes through the porous pipe ( Network management) By following the airflow direction changes, would also reduce the exhaust pressure, shake will also reduce, after porous pipe attenuation has large local energy is consumed, and atc road coated with sound-absorbing materials, eventually exhaust noise attenuation and sound-absorbing cotton absorption through multiple tube after reduced a lot. If remove the muffler internal of atc, exhaust energy without attenuation, sound-absorbing materials will not get very good effect, and direct exhaust almost, so the exhaust noise is great! Able to blast the street!