How to solve the resonance of exhaust pipe

The vibration of the exhaust pipe can turn the muffler into a first-class back pressure and put the steel ball into the muffler. After the modification, the vibration frequency of the muffler will be changed from three air vibrations per row to one vibration, and the steel balls can absorb part of the energy of the exhaust gas, but the vibration of the steel balls will not be transmitted to the muffler shell, so the vibration of the muffler shell will be much smaller than before, and the service life of the muffler will be doubled after the modification. Construction machinery and agricultural machinery can also be modified in this way. There is no moisture in the muffler. After modification, the inside of muffler will never rust again. If the steel ball near the exhaust port is pressed to block the dust, the emission of PM2.5 can be reduced by more than 20%. My motorcycle has been modified like this for more than three years. Patents. I have modified pictures in Weibo and QQ photo album and post bar.