Selamet, Ahmet Center for Automotive Research, Ohio State University, Columbus, Ohio.
Last reviewed:December 2019
- Reactive mufflers
- Dissipative mufflers
- Active mufflers
- Design tools
- Related Primary Literature
- Additional Reading
A device used to attenuate sound while also allowing fluid (usually gas) to flow through it; also known as silencer in British usage. Mufflers are extensively used to reduce the intake and exhaust noise from pumps, fans, compressors and internal combustion engines. Although active noise control techniques are emerging, most mufflers continue to use passive silencing methods. Passive mufflers are categorized as reactive or dissipative based on their primary method of attenuation. Reactive mufflers reflect sound back toward the noise source and dissipative mufflers use porous materials to absorb the sound (Fig. 1).
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