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Figure 3 Distributions of effective levels L’p,Aeq,n found using the empirical method, at two representative frequencies, 250 Hz (Panel a) and 2000 Hz (Panel b).

Figure 3 Distributions of effective levels L’<sub>p,Aeq,n</sub> found using the empirical method, at two representative frequencies, 250 Hz (Panel a) and 2000 Hz (Panel b).