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Muffler Technology: A Look Inside Fresno CA

Regardless of the name, mufflers all do something to change, dampen or absorb the noise-producing pressure pulses in the exhaust. Some mufflers do it by creating resistance with baffles and louvered tubes. For details of mufflers, please keep on reading.

Triple A Automotive
(559) 321-7103
906 Barstow
Clovis, CA
Cars
(559) 485-7296
2229 E McKinley Avenue
Fresno, CA
Brownie Muffler Service
(559) 237-2081
3316 E Ventura Avenue
Fresno, CA
Goodguys Tire Center
(559) 221-1438
4140 N Blackstone Avenue
Fresno, CA
Rick's Tire & Service
(559) 485-7970, 001-2004
1501 Fulton Street
Fresno, CA
Belmont Tire & Automotive
(559) 485-8970
1449 E Belmont Avenue
Fresno, CA
Blackstone Brake & Auto Repair
(559) 264-7863
1558 N Effie Street%2C %23 102
Fresno, CA
A & J Auto Repair
(559) 222-3912
4323 N Blackstone Avenue %23 B
Fresno, CA
D & R Automotive of Fresno Inc
(559) 266-6060
901 M Street
Fresno, CA
Goodguys Tire Center
(559) 237-9383
2530 N Weber Avenue
Fresno, CA
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Muffler Technology: A Look Inside

Is a muffler nothing more than a steel can with some baffles and tubes inside? That's how most mufflers look, but there's a lot more to muffler science than meets the eye.

A muffler's job is to muffle sound. That's why we call them mufflers. In England they're called silencers. Regardless of the name, they all do something to change, dampen or absorb the noise-producing pressure pulses in the exhaust. Some mufflers do it by creating resistance with baffles and louvered tubes. Resistance to flow causes the pressure pulses to stack up and dissipate, lowering their energy and the level of sound they produce (which is measured in decibels).

Some mufflers turn the pressure pulses against themselves by rerouting and redirecting the exhaust through "tuning" chambers. By carefully adjusting the volume and length of the chambers, the pressure pulses can be attenuated within certain frequencies.

Another trick that's used to control noise is to pack areas around the louvered tubes inside the muffler with strands of fiberglass (called "roving"). The sound-absorbing properties of the fibrous material acts like insulation to further absorb and dampen energy in the exhaust pulses.



More recently, the science of acoustics and gas flow dynamics has yielded some new muffler designs that use "reflective sound cancellation" (RSC) technology. Such mufflers eliminate unwanted sound frequencies without the use of restrictive baffles or packing material. An air gap in the tube allow...

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