"IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,   1.540588
      31.5,   11.86703
        63,   23.78224
       125,     33.207
       250,   34.17814
       500,   33.76445
      1000,   33.10071
      2000,    35.5988
      4000,   30.39734
      8000,   27.38038
     16000,   25.37833
