"IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,   2.791087
      31.5,   13.04022
        63,   25.42033
       125,   34.38894
       250,   34.93305
       500,   37.94284
      1000,   40.75652
      2000,    44.0883
      4000,   41.83142
      8000,   43.79964
     16000,    43.5937