Problems Concerning the Bone Conduction Tests

Abstract

After limiting the air conduction threshold one bone conduction receiver is placed at the front of the tested person. Double contralateral masking: an olive of the rubber tube, connected with Bárány's box is tightly fitted to the external meatus and to the mastoid bone, is placed an oscillating vulcanite adapter connected with this box by a bifurcate metalic tube. Audiometric bone conducting tests are performed in the interrupted form eliminating the across-head difference. Fifteen cases of different impairments of hearing, bone conduction Gellé, Wheatstone-Bing, Runge tests and the crossed hearing of bone perception in two cases of congenital deafness are discussed.