bpm assist tool
Created by Ross Doran.
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Input
Distances measured in feet.
Elevation
Barrier elevation
Barrier height
Barrier ground height (H)
Noise source elevation
Noise source height
Noise source ground height (S)
Observer elevation
Observer height
Observer ground height (O)
Distance
Distance from observer to barrier (D
1
)
Distance from barrier to noise source (R
1
)
Calculate!
Output
Observer Output
Height difference of observer and barrier:
°
Subtended angle from observer to barrier =
°
Noise Source Output
Height difference of noise source and barrier:
°
Subtended angle from noise source to barrier =
°
Final Output
α =
Subtended angle from observer to barrier
+
Subtended angle from noise source to barrier
α =
° +
°
α =
°