Marine muffler

Method and apparatus for reducing aerodynamic whistle

Method and means for controlling the air pressure in a sound-pro

Mineral aggregate (perlite) acoustical board

Movable acoustic shell assembly

Muffler

Muffler

Muffler

Muffler

Muffler construction

Muffler converter

Muffler for a governed pneumatic tool

Muffler for intermittent blasts of air from pneumatic tools, val

Muffler for pile driving apparatus

Muffler system

Muffler with rupture control means

Mufflers

Multi-chamber muffler

Multi-layered acoustic liner

Multi-ply woven article having acoustical elements between doubl