Teana stopped the car and found that it sounded like a metal hammer striking iron, which was crisp. What is the sound of "bouncing"?

1. To be exact, this sound comes from the exhaust pipe, which also means that your exhaust pipe is new. The exhaust pipe is divided into three sections, the first section is from the engine exhaust port to Sanyuan, and the middle section is of course the middle section.

2. It includes three components and a small muffler. The muffler in this section mainly eliminates the middle and high frequencies from the engine, and the tail section is the last section. As we can see from the back, there is a big bag, which plays a major role in eliminating other sounds such as low frequencies.

But some cars have two sections, but their functions are the same.

1. The exhaust pipe is made of sound-absorbing material wrapped in double-layer iron sheets, and the inside is zigzag, with many large and small holes to absorb engine noise.

2. When the iron sheet is heated, it will change, that is, it expands with heat and contracts with cold. The exhaust temperature of the engine is very high. Of course, the exhaust pipe will be very hot When it is cold after parking, it will make a sound as soon as it shrinks, which is the sound you hear! This is normal.

3. After a while, when the metal is tired, the sound is gone! That's why the sound stopped after a while.

The exhaust pipe of the new car is bright, and it will rust in a few days, which is normal.