Hearing Screening Online Training Program

Biologic Calibration Check

Printer-Friendly Version (PDF: 13KB/2 pages)

To insure that the audiometer is in calibration, the person with primary responsibility for the hearing screening program should do biologic calibration checks. These calibration checks should be done each day prior to use or anytime during use when there is reason to suspect the audiometer may not be working properly. To perform a biologic calibration check, special training in threshold audiometry is required. To obtain this training, call the Minnesota Department of Health Hearing Screening Program at 651-215-8960. Use the “Same Ear Hearing Level (HL)” procedure described below.

Same Ear HL Procedure:

1. Obtain a threshold (500-8000 Hz) on the better ear with right (red) earphone - record the results.

2. Obtain a threshold (500-8000 Hz) on the same ear with the left (blue) earphone - record the results.

3. Check the thresholds at each frequency to see that they differ by no more than ±5 dB at any frequency. If the thresholds vary by more than ±5 dB, the audiometer should not be used, and the audiometer should be checked electronically.

Biologic Calibration Check Sheet

Audiometer I.D._______________

Same Ear Hearing Threshold Level (HTL)
Date Phone 500 1000 2000 4000 8000 Screener
  Red            
Blue          
  Red            
Blue          
  Red            
Blue          
  Red            
Blue          
  Red            
Blue          
  Red            
Blue          
  Red            
Blue          
  Red            
Blue          
  Red            
Blue          
  Red            
Blue          
  Red            
Blue          
  Red            
Blue