duct silencer

sound attenuator

In ductwork, a device (usually prefabricated) especially designed to provide much greater sound attenuation than would be provided by an equal length of ductwork; the pressure drop through the device is greater than for an equal length of ductwork.
References in periodicals archive ?
The work will include the wind tunnel ducting, fan and drive system, in-line heat exchanger (to couple with the building chiller system), turning vanes, duct silencers and necessary honeycomb and screens.
Sheet steel, 110 pieces shut, blind and butterfly valves, 410 piece silencer, round, 115 pieces duct silencers, 425 Plate valves, 190 pieces DrallluftauslEnsse, 320 piece grille 1 050 m of textile outlets DN 2502 000 mA insulation in air lines including fitting proportion, 250 mA Fire protective clothing, ventilation duct.
High Temperature Effects on the Insertion Loss of Absorptive Duct Silencers," Canadian Acoustics Journal, Vol.