"Power Spectrum IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,       -200
      31.5,   56.55346
        63,   50.80116
       125,   44.22291
       250,   36.24276
       500,   59.11797
      1000,   56.18276
      2000,   46.33577
      4000,   51.46466
      8000,   37.79424
     16000,   24.72387