MUFFLER WITH ACOUSTIC ABSORPTION INSERT FOR LIMITED CLEARANCE PNEUMATIC DEVICE APPLICATIONS

摘要

A muffler (20) for attenuating noise produced by a pneumatic device having limited clearance. The muffler (20) includes a housing (22), a base (24) and an acoustic absorption insert (100). The housing (22) defines an upstream end and a downstream end (34), with the downstream end (36) being closed. Further, the housing tapers from a maximum width of less than approximately 1.5 inches (38 mm) to the downstream end. The base (24) is secured to the housing at the upstream end and includes a tube (26) for directing airflow and sound waves into the housing. Finally, the acoustic absorption insert (100) is disposed within the housing and includes a web of fibers configured to absorb sound waves. The muffler can be utilized with a pneumatic valve having limited space available for receiving the muffler, providing noise attenuation with minimal back pressure.