OBJECTIVE AUDIOMETRY USING PSYCHOGALVANIC SKIN RESPONSE
1960 Volume 63 Issue 6 Pages 1424-1437
Details
1960 Volume 63 Issue 6 Pages 1424-1437
The author conducted experiments with objective audiometry using psychogalvanic skin response, applying endsomatic method with balanced negative feed-back amplifier system. This apparatus could eliminate the disadvantages of exosomatic method which has been in use. Using this apparatus author tested 85 cases (7 months-62 years of age) with from normal hearing to severe hearing loss.
The results obtained were as follows:
1) Thirty-six cases, 68 ears (5.1-62 years of age) were tested by both P. G. S. R. audiometry and standard pure tone audiometry. Reliability in these two methods were within ±5db in 53.2%, and were within ±10db in 79.8%.
2) Average difference were 6.6db lower by P. G. S. R. audiometry than standard pure tone audiometry.
3) Eighty-five cases were classfied to three groups:
A) Cases responded to sound and shock and onditioned readily, 45 case, 52.9%.
B) Cases respoded to sound and shock and difficult or impossible or conditioning was not attempted, or threshold was not measured, 25 cases, 17.6%,
C) No response to sound or shock graphically, 15 cases, 17.6%.
4) Difficulty were increased under three years of age. The youngest subject successfully examined by P. G. S. R. audiometry was 2 years and 11 months old.
5) P. G. S. R. audiometry was successful in 80.6% over 10 years, and were successful in 37.0% under 10 years of age. Rate of successful test was higher in the group with hearing loss, especially in children under 10 years, satisfactory results were obtained in 41.8%.
6) Rate of successful test was not so high in P. G. S. R. audiometry alone. It is desirable to use several tests, such as play audiometry, speech audiometry and etc, so that more statisfactory results are obtained in clinical application.
