"Power Spectrum IEC 1/1-Oct Mag - dB SPL "
      "Hz"      "Data"
        16,       -200
      31.5,   58.38986
        63,   59.01427
       125,   45.21608
       250,    47.9427
       500,    64.1195
      1000,    62.5551
      2000,   48.45819
      4000,   36.61898
      8000,    22.3188
     16000,   21.47039