KEYB_ICOCommand prompt:`vnnp_noiseaddtolden`

Prompts the user for a noise value, which is then added to the Lden value for all active calculation points. This is done by logarithmic addition. E.g. will a point with an Lden value of 60dBA, when adding 60dBA, get a result of 63dBA. The function is used when adding a noise value calculated without Novapoint Noise, to a calculation point. This could e.g. be tunnel noise.

Note that this is a one time operation, not an attribute to the point! If you calculate these points again, you would have to rerun this function afterwards to re-add the externally calculated noise values.

The function can also be used to do manual adjustments to calculation points when needed. Remember to describe in all reports what is done and exactly why!

**Example:**
You have manually calculated tunnel noise and received this as noise contour lines. You now wish to add these values to the noise values you have already calculated for the road traffic.

MOUS_ICOMenu:Noise > Calculationpoints > Dialogbox

Check thatStatis set to:usActive and passive

MOUS_ICODialog box:Select all

MOUS_ICODialog box:Passive…

MOUS_ICODialog box:Reset

MOUS_ICODialog box:Select from screen <

Command prompt:cp<Enter>

Draw a polyline along the tunnel noise contour with the lowest value and finish by entering <Enter> twice.

MOUS_ICODialog box:Active…

Now all points within the lowest tunnel noise contour are active.

MOUS_ICODialog box:Reset

MOUS_ICODialog box:Select from screen <

Command prompt:cp<Enter>

Draw a polyline along the tunnel noise contour with the second lowest value and finish by entering <Enter> twice.

MOUS_ICODialog box:Passive…

Now only the points between the lowest and second lowest tunnel noise contour lines are active.

MOUS_ICODialog box:OK

Command prompt:vnnp_noiseaddtolden<Enter>

Enter the value of the lowest tunnel noise contour (make sure rounding logic is correct, always round upwards if rounding). E.g. enter 41 if the lowest tunnel noise contour is 40dBA (since the points between the 40dBA line and the 41dBA line might have up to almost 41dBA).

Continue with selecting all points between the second lowest and third lowest contour line and so on.