Filter muffler
Finding distance to blowout using wellbore acoustic measurements
Fine jet control-type sound absorption system
Fine tuned, column speaker system
Firearm sound suppressor baffle
Fireplace flue ambient noise reducing device
Firing device, explosive charge, method, and system, for seismic
Five-layer sound absorbing pad: improved acoustical absorber
Fixed geometry controlled entrainment ventilated convergent nozz
Fixing structure of tail pipe of exhaust pipe
Flapper configuration for marine exhaust system
Flapper finger valve
Flapper finger valve assembly
Flat acoustic diffuser
Flat panel diffuser
Flat panel diffuser
Flat panel sound radiator and assembly system
Flat panel sound radiator with fire protective back box
Flat-diaphragm transducer and method of manufacturing such a tra
Flattened venturi, method and apparatus for making