after heated and often bitter debates, SIEBENMANN'S opinion finally prevailed, i. e., a contribution to cochlear lesions due to vibrations of the floor transmitted via bone conduction could not be demonstrated. For one thing, it was hard to see how appreciable amounts of energy could reach the ears in this manner, considering the attenuation that is bound to occur across each of the many joints along the pathway involved. In some older audiological surveys conducted in industry (e. g., TEMKIN, 1933), groups of workmen were found who displayed signs of apical-turn lesions, i. e., low-tone...