| Popis: |
The initial rate, extent, and recovery from auditory adaptation (Hood's perstimulatory fatigue) were measured in both the presence and absence of noise in ten normal ears by the method of fixed intensity at 250, 1000, and 4000 cps. It was found that the initial rate and extent of adaptation in noise were excessive at 4000 cps, but not at either 250 or 1000 cps. Recovery from adaptation was found to be equivalent, but never complete, at each frequency in both noise and quiet. When the noise was sustained in one ear and a pure tone introduced over the noise at 1‐min intervals, there was an apparent decline in the ear's response at 250 and 1000 cps, but not at 4000 cps. When the noise was not sustained, but followed the same periodic intervals as each pure tone, there was a decline in response at 4000 cps, but not at either 250 or 1000 cps. |
