"Power Spectrum IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,       -200
      31.5,   61.86342
        63,   56.63438
       125,   50.36817
       250,   44.29242
       500,   51.66829
      1000,   51.67182
      2000,   50.19807
      4000,   43.28111
      8000,   30.49055
     16000,   19.90509