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Specification for the range of audiometric frequencies from 125 to 8000 Hz and for groups of otologically normal persons of a given age within the age limits of 18 to 70 years inclusive : a) the expected value of the median hearing threshold shift relative to a group of persons 18 years of age; b) the expected statistical distribution above and below the median value.
Reģistrācijas numurs (WIID)
9727
Darbības sfēra
Specification for the range of audiometric frequencies from 125 to 8000 Hz and for groups of otologically normal persons of a given age within the age limits of 18 to 70 years inclusive : a) the expected value of the median hearing threshold shift relative to a group of persons 18 years of age; b) the expected statistical distribution above and below the median value.
