During past three years, fourteen hundred patients injured by traffic or labour accident, complaining hearing disturbance were treated and tested in our clinic. Forty percents of the patient had no any objective findings nor symptoms, might be called stigmata hearing disturbance in a wide sense.
During last year, fourteen patients among four hundred complaining of hearing disturbance according to traffic or labour accidents were suspected to be simulated, and ten of them were diagnosed to have stigmata hearing disturbance after several close examination for hearing, and psychology.
The cause of the accidents were following, seven patients were injured by labour accidents, and the others were by automobile accidents. The six of them had uncosciousness at accident. The six of them had a facial fracture, one of them had a skull depression fracture, and one had fracture of the basis of skull, and the other four had no fracture in x-ray study.
In standard audiometry, all cases had flactuation in its threshold, so it was very difficult to determine their threshold. Saucer shape audiogram were obtained in three patients and Stenger's test was positive in six cases. Using average response computer, the threshold of evoked response audiometry was lower than that of standard audiometry in all cases.
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