77 Ill. Adm. Code 675.100
Instrumentation
Section 675
Section 675.100Â
Instrumentation
a)Â Â Â Â Â Â Â Â Pure-tone audiometers utilized for identification audiometry
must comply with minimum specifications established by the American National
Standards Institute as published in the American National Standard
Specifications for Audiometers. (ANSI 3.6 1996)
b)Â Â Â Â Â Â Â Â Pure-tone audiometers utilized for identification audiometry
must undergo an electro-acoustic coupler calibration check a minimum of once
per calendar year. The electro-acoustic calibration check shall include the
following measurements:
1)Â Â Â Â Â Â Â Â frequency count;
2)Â Â Â Â Â Â Â Â attenuator linearity; and
3)        earphone sound pressure level output.
c)Â Â Â Â Â Â Â Â Annual calibration check services can be acquired from either
the Department (for a $10 fee) or other qualified entity (a dealer or
manufacturer who has technical knowledge and experience in repair and
maintenance of audiometric equipment). Any audiometer that does not meet ANSI
3.6 (1996) and/or does not pass the listening or visual check is required to be
calibrated and/or repaired by a dealer or manufacturer who has technical
knowledge and experience in repair and maintenance of audiometric equipment.