V1:ENV_LB_MIC vs V1:ENV_CEB_MIC
      Hz,  Lout(dB), Lin(dB), Trev correction, ISOL(dB)
     0.8,    48.2,    48.9,     nan,     nan
     1.2,    43.3,    48.5,     nan,     nan
     1.4,    41.0,    49.7,     nan,     nan
     1.8,    36.5,    47.2,     nan,     nan
     2.2,    34.6,    45.4,     nan,     nan
     3.0,    32.2,    39.2,     nan,     nan
     3.8,    36.6,    34.3,     nan,     nan
     5.0,    36.1,    28.1,     nan,     nan
     6.2,    33.3,    20.4,     nan,     nan
     7.8,    35.4,    21.1,     nan,     nan
     9.8,    42.6,    25.9,    -0.0,    16.7
    12.4,    43.5,    33.0,    -0.0,    10.5
    15.4,    42.7,    28.1,    -0.0,    14.6
    19.6,    40.3,    30.5,    -0.0,     9.8
    24.6,    41.6,    23.4,    -0.0,    18.2
    31.2,    45.8,    22.3,    -0.0,    23.5
    39.2,    49.3,    29.0,    -0.0,    20.4
    49.6,    57.9,    31.8,    -0.0,    26.1
    62.6,    59.5,    32.6,    -0.0,    26.9
    78.8,    60.3,    33.6,    -0.0,    26.7
    99.2,    61.2,    32.1,    -0.0,    29.1
   125.0,    65.9,    29.9,    -0.0,    36.1
   157.6,    67.3,    28.7,    -0.0,    38.5
   198.4,    68.8,    34.4,    -0.0,    34.4
   250.0,    68.3,    26.5,    -0.0,    41.8
   315.0,    69.8,    26.1,    -0.0,    43.6
   397.0,    69.5,    38.5,    -0.0,    31.0
   500.0,    71.8,    33.7,     nan,     nan
   630.0,    71.8,    23.9,    -0.0,    48.0
   793.6,    68.6,    19.3,    -0.0,    49.3
   999.8,    70.7,    19.8,    -0.0,    50.9
  1259.8,    71.7,    18.8,    -0.0,    52.9
  1587.4,    70.2,    21.8,    -0.0,    48.3
  2000.0,    66.4,    18.0,    -0.0,    48.4
  2520.0,    54.9,    14.7,     nan,     nan
  3174.8,    42.8,    12.5,    -0.0,    30.3
  4000.0,    38.2,    11.4,    -0.0,    26.8
  5039.6,    37.4,    11.2,     nan,     nan
  6349.6,    33.7,     8.8,     nan,     nan
  8000.0,    28.0,     2.8,     nan,     nan