29. The audiometric measure for allocating assistive listening devices shall be calculated according to American National Standards Institute Standards S3.1, S3.6 and S3.21, on average, over a frequency range of 500, 1,000, 2,000 and 4,000 Hz for the better ear.
O.C. 869-93, s. 29; O.C. 535-97, s. 22; O.C. 382-2006, s. 18.