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Figure 1: Audiometric thresholds of two participants (20 and 33 year olds) without any history of noise exposure and the 10th and 90th percentile data for 30-year-old unscreened population from ISO 1999 database B

Figure 1: Audiometric thresholds of two participants (20 and 33 year olds) without any history of noise exposure and the 10th and 90th percentile data for 30-year-old unscreened population from ISO 1999 database B