"Power Spectrum IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,       -200
      31.5,   55.06796
        63,   54.87014
       125,   49.51927
       250,   44.60558
       500,   44.96193
      1000,   47.27949
      2000,   51.47646
      4000,   39.67557
      8000,   33.47152
     16000,   21.14678