Trends in newly available country-specific hearing threshold data compared to ISO 7029 for male adults The hearing threshold deviation data for male adults in the 125–8,000 Hz range for the four countries showed a trend of similar or slightly higher deviations compared to the ISO 7029 data ( Fig. 3 ).
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Trends in Distributions of Hearing Threshold Levels by Ages: A Comparison of the ISO 7029 and Newly Available Country-Specific Data.
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