"IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,   6.200961
      31.5,   13.24719
        63,   23.33426
       125,   32.47048
       250,   34.54633
       500,   36.45654
      1000,   38.63603
      2000,   40.76455
      4000,   34.47432
      8000,   30.69909
     16000,   25.35286
