"Power Spectrum IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,       -200
      31.5,   54.50117
        63,    52.5068
       125,   50.81043
       250,    39.9497
       500,   50.41509
      1000,   48.69712
      2000,   43.26846
      4000,   44.72396
      8000,    29.5559
     16000,   18.91118