Inside a Muffler - How Mufflers Work

Mufflers cancel out most of an engine’s noise. Find out how mufflers cancel sound waves, why engines are so loud, and look inside a muffler to learn about backpressure.
Every car out there has a muffler -- it performs the crucial job of turning thousands of explosions per minute into a quiet purr. Mufflers use some cool technology to dim the roar of an engine. Learn the principles that make it work.

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