"Power Spectrum IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,       -200
      31.5,   58.56126
        63,   58.35704
       125,   49.14666
       250,   48.79428
       500,   65.06924
      1000,   67.76687
      2000,   51.13575
      4000,   37.67219
      8000,   29.10995
     16000,   21.34226