References
Highlights
![](/fileadmin/ProduktWebseiten/DIGITAL/akut-tunnel.com/arlber-tunnel-web.jpg)
Longest tunnel equipped with AKUT
Arlberg tunnel
15,516 m
![](/fileadmin/ProduktWebseiten/DIGITAL/akut-tunnel.com/pernau-tunnel-web.jpg)
Shortest tunnel equipped with AKUT
Pernau tunnel
268 m
![](/fileadmin/ProduktWebseiten/DIGITAL/akut-tunnel.com/plabutsch-tunnel-web.jpg)
Tunnel with the largest number of microphones
Plabutsch tunnel
282 microphones
![](/fileadmin/ProduktWebseiten/DIGITAL/akut-tunnel.com/kaisermuehlen-tunnel-web.jpg)
Tunnel with highest DTV
Kaisermuehlen tunnel
DTV: 110,000