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Table 2 LAeq and LZpk measured for four different brain research protocols. The noise levels experienced by the participant (columns 3 and 5) take into account 12.5 dB noise reduction by the ear plugs

From: Practical issues and limitations of brain attenuation correction on a simultaneous PET-MR scanner

Study number Measured LAeq, dB(A) LAeq experienced by participant, dB(A) Measured LZpk, dB LZpk experienced by the participant, dB
1 93.5 81.0 110.5 98.0
2 92.8 80.3 112.5 100.0
3 94.3 81.8 126.6 114.1
4 91.9 79.4 144.5 132.0