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 Hearing Impairment Projection - AAO 1979 :

All frequencies must 
be filled in with values in dB.

If hearing threshold is greater than 100 dB enter 100 dB. If hearing threshold is less than zero dB 
enter 0 dB.

Patient's age must be greater than 18 yrs to calculate presbycusis.

250 Hz

500 Hz

1000 Hz

2000 Hz

3000 Hz

4000 Hz

6000 Hz

8000 Hz



Enter Patient's Age at time of Audiogram:

Enter Patient's Age for the Projected

Directions:  Age is entered in years.  Two decimal points can be entered.  To calculate age from the patient's birth date to the audiogram's test date, use the "Find Years From Dates" screen button.

Presbycusis & Test Projection

Calculate Hearing Impairment

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