Grazing flow impedance tubes. Straight GFIT. Curved GFIT. Straight GFIT. The Impedance Tube is a 4m long, with a 50.4mm x 50.4mm square cross-section. The setup can be used both with or without ...

Collectively, these advances offer a more comprehensive understanding of how acoustic liners interact with grazing flows and highlight new directions for noise reduction and flow control technologies.