🌀 That annoying DRONE at highway speed? It's not a broken part—it's physics in action! Your exhaust system can accidentally become a giant musical instrument. Here's how to tune it. 🌀 Resonance in Exhaust Systems: How Sound Waves Amplify and are Controlled Think of your exhaust pipe as a giant organ pipe. At certain engine speeds (RPM), the frequency of the exhaust pulses perfectly matches the pipe's natural length. This creates RESONANCE—where sound waves reinforce each other, amplifying one