"Power Spectrum IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,       -200
      31.5,    53.6142
        63,   56.08277
       125,   47.92593
       250,   44.87452
       500,   46.78673
      1000,   45.08595
      2000,   49.72288
      4000,   39.33724
      8000,   29.45988
     16000,   20.40273