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A resonator installed as part of your car or truck’s exhaust system serves one main purpose — to resonate. It’s sort of an echo chamber for your car’s exhaust, preparing all of the loud noise coming from your engine for the muffler to silence it. But there is far more science to it than that.


The purpose of a resonator is to cancel out a certain range of sound frequencies. Without getting too scientific, sound is simply a pressure wave emitted at a certain frequency. Like waves in the ocean, sound waves have certain amplitudes (comparable to overall size), a crest and a trough.


Exhaust resonators are add-on features within the exhaust system. The resonators are used primarily in combination with the muffler to reduce excessive exhaust noise. Exhaust resonators create additional sound waves, which effectively cancel out exhaust system noise. The ability of the exhaust resonator to suppress excessive noise helps ...


Things like the header, catalytic converter and muffler are all terms that you hear often but one that often goes unrecognized is the exhaust resonator. While you might mistake it for a muffler, the resonator actually has a very different and important job to do when it comes to your vehicle’s exhaust. Here’s a quick look at what it does.


The resonators in your exhaust tune the exhaust note into something that is not brutal on the ears, along with the muffler, which quiets the whole thing down. Removing the exhaust resonators will just make the car sound worse and louder.


The muffler inlet is a resonator chamber that controls and directs the back pressure of the exhaust into the baffled chamber. There are two or more baffles inside a muffler which are tubes with holes drilled through them.


Resonators are often confused with mufflers, since they have similar functions however, they are two distinct devices. A muffler functions to simply reduce the volume of the exhaust sound, but a resonator can selectively cancel or amplify certain frequencies of sound, so as to produce a custom sound.


Mufflers vs Resonators - What's The Difference? Some aftermarket cat-back or axle-back exhaust systems can sound great on the outside of the car, but have a deafening drone as you cruise down the highway. Adding resonators before the mufflers can help dial down the interior drone with minimal change to exterior exhaust note.


A typical automotive exhaust resonator is made of a hollow steel cylindrical tube and is attached to the muffler of an exhaust system. This type of resonator is designed similar to that of an acoustic resonator, which creates an “exhaust note” that gives the exhaust noise a less annoying and more pleasant tone.


Find out what happens when you replace the spark arrestor or the resonator with a piece of pipe with help from an expert in the automotive industry in this free video clip. Expert: Robert Holcomb ...