The Muffler is an essential part of any vehicle. It reduces the sound from the vehicle and assists with improving vehicle performance at the same time. Very few people actually understand the complex workings of a muffler. Some believe the sound is reduced by creating exact opposite Sound Waves – the same technique as used in noise cancelling headphones. This is not the case as the muffler doesn’t remove the sound – it only reduces the level of sound output. Mufflers are made from materials designed to absorb the sound waves coming into the chamber – along with smoke from the vehicles engine.
Some mufflers use resonators to assist with further reductions in the volume of the sound output. With the assistance of these resonators, high frequency sound waves are pulled into the chamber and bounce back into the engine, thereby halting the low frequency soundwaves before they reach the chamber. Resonators are usually used and associated with high end luxury vehicles. However, if you are looking for low volume engines you need to discuss resonator options with your local specialised muffler retailer.