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The Active Noise and Vibration Control Group

Active Control of Transmission Loss of Double Wall Structures

The sound transmission loss of a double-glazed window is inreased by actively controlling the sound field in the cavity between the panels.

Control loudspeaker    Sending room with noise source    View from the receiving room into the sending room

(Pictures of the double glazed window at EMPA Duebendorf)


Duct at IFA (ETH)    Duct at IFA (ETH)   

(Pictures of a smart duct at IFA (ETH Zurich))