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A noise exposure threshold level for hearing conversation

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Figure

Table 1a:One set of NIPTS data for 4 kHz, derived from Robinson and Shipton (1977)
Table A1:Values of L0 for each audiometric frequency
Table A3:Hearing threshold levels, in dB, for an otologically normal population.
Table A2. Assuming that this individual started work at age 20 years, then his 10years of noise exposure would make his present age 30 years
+2

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