"IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,   5.291536
      31.5,   14.26861
        63,   26.70451
       125,   36.06547
       250,    38.6851
       500,   43.00712
      1000,   47.14818
      2000,   51.96238
      4000,   53.99504
      8000,   54.40166
     16000,   55.89345
