Aerial image of the built-over motorway section
Noise abatement measure A1
Cologne Lövenich
188 Labyrinth ventilator Hydra 4 x 6m
![Noise abatement measure A1 - Cologne Lövenich](https://www.indu-light.com/_Resources/Persistent/c/1/5/c/c15c84a385d3be75a82f5c60a3c8b20d088b2b16/a1-tunnel_1-1600x1071.jpg)
![Noise abatement measure A1 - Cologne Lövenich](https://www.indu-light.com/_Resources/Persistent/5/b/a/d/5bad0ba4ebd6443cac5d7811a4c5de55c7bfb76d/a1-tunnel_2-1600x1173.jpg)
Hydra labyrinth ventilator in a glass roof
![Noise abatement measure A1 - Cologne Lövenich](https://www.indu-light.com/_Resources/Persistent/b/a/2/2/ba225afb691ec25871f4af8631b7783ce1b9a059/a1-tunnel_3-1600x1065.jpg)
View from below of the sound absorber of the Hydra labyrinth ventilator in a glass roof
![Noise abatement measure A1 - Cologne Lövenich](https://www.indu-light.com/_Resources/Persistent/a/0/c/f/a0cf027ffad293f3d4f4017e2903a47e689ba795/a1-tunnel_4-1600x1065.jpg)
Hydra labyrinth ventilator in a glass roof