Remote Masking in Selected Frequency Regions

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Abstract
Masked audiograms for 6 different masking stimuli were obtained from 5 observers. The audiograms show that remote masking can be controlled with respect to frequency region by controlling the envelope of the masking sound. Regular variations in the envelope at for instance, 500 cps produced remote masking in the 500 cps region; irregular, "random," variations produce equal amounts of masking everywhere outside the frequency region corresponding to the masking band or tone. It is argued that the constant masking seen in remote masking is related to the fact that signal frequencies are differentially attenuated in their transmission from the tympanum to the cochlear partition, while the masking frequencies are not, because they are actually generated at the cochlear partition itself.

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