Abstract
A new conditioning technique was presented here for the achievement of objective audiometry using galvanic skin response.Galvanic skin response(GSR) audiometry with eletcric shock stimuli is usually accompanied by uncomfortable pain or anxiety of the patient, and may be an unpleasant experience for the child.As practical solution of such problemes, jet-air conditioning was devised. And it was studied experimentally and clinically. The conditioning schedule was set up as 60% partial reinforcement, i, e., the patient was irregu- lary given fifteen tone stimuli between 15 and 45 seconds, of which nine were combined stimuli of tone and jet-air.The jet-air pressure was about 30mmHg and was puffed out to the external canthus of the patient from a distance of about 20 centimeters, and was presented immediately after the, presentation of pure tone of 1, 000cps for 2 to 3 seconds at a level of 40db above the presupposed threshold. Some basic experiments and investigations in jet-air conditioning were carried out in 110 subjects from 4 to 43 years of age.And it was promised that jet-air conditioning might be succeeded above at the rate of 80% of subjects. Clinical application was carried out in 57 children from 2 to 12 years of age and in 20 adults. The threshold determination was performed at each frequency of 1, 000, 2000, 4, 000 and 500cps after conditioning by the reinforcement schedule.We could succeed to get the thresholds in 52 cases out of 57 children(91.2%) and 16 cases out of 20 adults(80.0%). Comparison of thresholds measured by using this method with those measured by subjective audiometry was studied.In children, both thresholds agreed at a level of ± 10db in each frequency as follows:97.3%in 1, 000cps, 91.9% in 2, 000cps, 85.9% in 4, 000cps and 89.5% in 500cps;and equally in adults. GSR audiometry by means of jet-air conditio- ning was proved one of the useful and excellent objective audiometries, particularly for children.
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