"IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,   3.241664
      31.5,   12.41429
        63,   23.73153
       125,   33.09514
       250,   34.64846
       500,   36.24807
      1000,   36.92206
      2000,   35.00854
      4000,   29.59748
      8000,   24.23026
     16000,   23.61329
