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Figure 9 :Comparison of annoyance ratings related to noise samples with different frequency spectra at similar A-weighted SPLs of 45.65 dB in experiment I (a) and of 56.7 } 1.2 dB in experiment II (b) (mean values with 95% confidence intervals). Annoyance related to spectrum D (experiment I) and spectrum no. VII (experiment II) was compared to annoyance from the other spectra. Only the cases without significant differences (2.091 . F(1,51) . 3.361, 0.161 . P.0.072 and 0.028 . F(1,68) . 2.604, 0.867 . P.0.111) in annoyance rating were denoted (*), for other cases significant differences were noted

Figure 9 :Comparison of annoyance ratings related to noise samples with different frequency spectra at similar A-weighted SPLs of 45.65 dB in experiment I (a) and of 56.7 } 1.2 dB in experiment II (b) (mean values with 95% confidence intervals). Annoyance related to spectrum D (experiment I) and spectrum no. VII (experiment II) was compared to annoyance from the other spectra. Only the cases without significant differences (2.091 . F(1,51) . 3.361, 0.161 . P.0.072 and 0.028 . F(1,68) . 2.604, 0.867 . P.0.111) in annoyance rating were denoted (*), for other cases significant differences were noted