# Calculating Sv Mean

Calculations are performed in the linear domain not the decibel domain.

{% embed url="<https://support.echoview.com/WebHelp/Reference/Algorithms/Analysis_Variables/Sv_mean.htm>" %}

```python
ds_Sv = np.array([-30, -50])
da_Sv = 10 ** (ds_Sv / 10)
10 * np.log10(da_Sv.mean())
# -32.967086218813385
```
