L - Linear characteristic
      Kv/Kv100 = 0,0183 + 0,9817 . (H/H100)
    R - equal-percentage characteristic (4-percentage)
      Kv/Kv100 = 0,0183 + . e(4.H/H100)
    P - parabolic characteristic
      Kv/Kv100 = 0,0183 + 0,9817 . (H/H100)2
    S - LDMspline® characteristic
      Kv/Kv100 = 0,0183 + 0,269 . (H/H100) - 0,380 . (H/H100)2 + 1,096 . (H/H100)3 - 0,194 . (H/H100)4 - 0,265 . (H/H100)5 + 0,443 . (H/H100)6