Part B - Technical instructions 
39 
Method 
(continued) 
Background noise mea 
surements: 
• Background noise com 
prises the sum of all na 
tural sounds in the pro 
ject area excluding 
construction noise. The 
existing sound of distant 
ships or operation noise 
from neighbouring wind 
turbines in the project 
area environment should 
be treated as background 
noise. 
Presenta- 
tion of 
results 
The “Measuring instruction for underwater sound measurements” (BSH 2011) applies. 
In the event of multiple pile 
structures (like jacket or 
tripod), the measurement 
results for pile driving of 
individual piles shall be 
evaluated and presented.