(1) The following tests shall be performed as specified:

(a) air conduction tests shall be conducted bilaterally in accordance with American National Standards Institute (ANSI) standard frequencies of 250-500-1000-2000-4000-6000 hertz. Appropriate masking shall be used.

(b) bone conduction tests shall be conducted bilaterally, if appropriate, on every patient in accordance with ANSI standards at 500-1000-2000-4000 hertz. Appropriate masking shall be used.

(c) speech reception threshold and discrimination testing shall be conducted in a quiet environment, with appropriate masking used and measurement of user discomfort level.

(2) At the time of fitting or during the trial period, the dispenser will verify and validate the hearing aid fitting and document the results according to generally accepted standards of practice to objectively analyze aided performance and establish the patient's perceived improvement.

(3) All audiometers shall be calibrated to ANSI standards once a year.

(4) The board may randomly audit up to 50 percent of renewed licensees for calibration compliance.