Perforated soundproof structure and method of manufacturing...
Perforation acoustic muffler assembly and method of reducing...
Peripheral return flow muffler
Perlite sound absorbing plate and sound insulating wall composed
Perpendicularly joined structure with thin-walled plates and thi
Phased treatment noise suppressor for acoustic duct applications
Phonic deadening device for conduit of sanitary installation
Pipe section punning along a curve
Pipeline vibration damper
Pivoting tuned vibration absorber and system utilizing same
Planar binary amplitude diffusor
Plastic air intake silencer box for marine engine
Plastic muffler and method for making same
Plate resonator
Plate suitable as a noise protection wall
Plug muffler for aircraft and method of construction thereof
Plug-type muffler section
Plural chamber stamp formed muffler with single intermediate tub
Pneumatic hand tool exhaust muffler
Pneumatic hand tool exhaust muffler