baseline audiogram

baseline audiogram

A reference audiogram against which future audiograms are compared.

For workers occupationally exposed to loud sounds, a baseline audiogram must be provided within 6 months of an employee's first exposure at or above an 8-hour TWA of 85 dBA.
References in periodicals archive ?
The baseline audiogram serves as the reference point for all subsequent hearing tests and allows for changes in hearing sensitivity at a given frequency to be documented.
The patient's actual baseline audiogram (solid line) would be provided on the same graph with gray shading indicating the "speech banana.
Ototoxic threshold shift from the initial baseline audiogram was defined as: (1) [greater than or equal to] 20 decibel (dB) decrease at any one test frequency, (2) [greater than or equal to]10 dB decrease at any 2 adjacent frequencies, or (3) loss of response at 3 consecutive frequencies where responses had previously been obtained.
This includes Soldiers without a reference baseline audiogram or whose last periodic audiogram is greater than one-year old.
STS is defined by the Occupational Safety and Health Act (OSHA) as an average l0-dB or greater shift from the baseline audiogram at 2.
STS is defined by the Occupational Safety and Health Act (OSHA) as an average 10-dB or greater shift from the baseline audiogram at 2.