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Mean BNL in the example listening environment plotted alongside ears-not-covered MPANLs, defined by ANSI/ASA S3.1 (1999), and the adequate noise rating curve NR10 (ISO 1996, 2016). Error bars indicate 95% confidence intervals of the mean.
Note. BNL = background noise level; MPANLs = maximum permissible ambient noise levels.
