Electrical device with sound damper has induction pipe guiding induction air, resonator housing enclosing pipe to form closed annular volume, axial series of transverse chamber walls

摘要

The electrical device takes in gas and/or emits gas and has a sound damper consisting of an induction pipe guiding induction air and resonator housing enclosing the induction pipe so as to form a closed annular volume, with inlet and outlet ports and openings in the induction pipe wall and an axial series of transverse chamber walls.