[Comparison of different charts for determining the percentage of hearing loss].

Different methods are being employed at present to determine the percentage of hearing loss, on the basis of speech-and-tone audiometry. We scrutinized 1000 expertises on noise, and we were able to show the comparative mutual relationships between the methods employed, on the basis of regression analysis. The methods according to Trautmann/Oeken were relatively better than the other methods, but none of these methods yielded optimal relations.