Soundbarrier

A Soundbarrier is a tech decoration. That means that the service time on a bay is faster by the %. It's service time is -0.8%. They each cost 500 Aircoins which is better to purchase Fence 1, Fence 2 and Fence 3. When put together, it really looks like a wall. You'll also unlock one when you cover Europe. This will be a red one. This is rare to see in high-ranked airports.

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Also see Fence 1, Fence 2 & Fence 3.