"IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,   6.996507
      31.5,   15.03482
        63,   27.01531
       125,   35.96838
       250,   38.56479
       500,   43.03131
      1000,    47.1012
      2000,   51.94392
      4000,   55.01058
      8000,   56.46624
     16000,   59.55576
