Collapsible portable acoustic tower
Composite material with acoustic absorption properties
Composite noise absorption product
Concert shell
Device for the attenuation of noise emission by the jet pipes of
Easily raisable and lowerable telescopic shell tower acoustic sy
Engine muffler apparatus providing acoustic silencer
Exhaust control method and apparatus
Exhaust muffler for competition car engines
Exhaust muffler for pneumatic tool or machine
Exhaust muffler having an attenuater can assembly
Exhaust silencer for motorcycle
Exhaust system cover assembly
Fan silencer
Flexible noise barrier material
Fluid exhaust silencer
Fluid layer acoustic shield for turbofan jet propulsion engine
Free flow sound attenuating device and method of making
Gas turbine engine noise shield
Gas turbine engine noise shield