AUDIOMETER EMPLOYING NARROW-BAND NOISE MASKING

摘要

In the audiometer disclosed herein, a noise signal is employed for masking or preventing reception of a test tone in the ear opposite that which is being tested. The masking noise signal comprises a pair of noise sidebands centered on the test tone frequency with the test tone frequency itself being substantially suppressed. Further, the bandwidth of the noise signal is controlled as a function of the frequency of the test tone so as to substantially correspond with the critical range of masking frequencies.