#T PI FILTERS DESIGN SERIES#

Many of the more complex mufflers today incorporate both methods to optimize sound attenuation and provide realistic specifications.

#T PI FILTERS DESIGN SERIES#

Reactive mufflers use a series of complex passages to maximize sound attenuation while meeting set specifications, such as pressure drop, volume flow, etc. Absorptive mufflers incorporate sound absorbing materials to attenuate the radiated energy in gas flow.

These are absorptive and reactive mufflers. The application of acoustic mufflers is mostly directed to machine components or areas where there is a large amount of radiated sound such as high pressure exhaust pipes, gas turbines, and rotary pumps.Īlthough there are a number of applications for acoustic mufflers, there are really only two main types which are used. Many common appliances, such as refrigerators and air conditioners, use acoustic mufflers to produce a minimal working noise. Although the idea might not be familiar to many people, acoustic mufflers make everyday life much more pleasant. 2.1 Plane-wave pressure distribution in pipesĪcoustic filters, or mufflers, are used in a number of applications requiring the suppression or attenuation of sound.

T pi filters design