"IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,   2.318093
      31.5,   12.02449
        63,   23.63941
       125,   32.95757
       250,   33.67124
       500,   32.70314
      1000,   34.95118
      2000,    36.2144
      4000,    31.8436
      8000,   29.32632
     16000,   27.71134