Double-walled tail pipe for an exhaust pipe of a motor...
Draining device for muffler of small planing boat
Draining device used in a car-muffler
Dry cooled jet aircraft runup noise suppression system
Dual cross-flow muffler
Dual entry plug muffler
Dual flow turbine engine muffler
Dual frequency side branch resonator
Duct and process for producing the same
Duct for reducing shock related noise
Duct silencer
Duct wall structure
Ductless acoustical noise attenuator