"Power Spectrum IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,       -200
      31.5,   56.71479
        63,   59.77478
       125,   47.30424
       250,   43.91649
       500,   47.68866
      1000,   44.38514
      2000,   45.53355
      4000,   43.31364
      8000,   31.72879
     16000,   22.99259