"IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,   6.947232
      31.5,   15.16492
        63,   27.14983
       125,   35.89512
       250,   37.65712
       500,   41.49127
      1000,   45.64824
      2000,   50.45604
      4000,    47.0344
      8000,   47.23542
     16000,   49.03991