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Updated: Jul 11, 2026

Testing Tactile Masking between the Forearms
Published on: February 10, 2016
Some observations on the masking effects of Mach bands
Tamara Curnow1, Dorothy A Cowie, G Bruce Henning
1Department of Physiology, Anatomy, and Genetics, Sherrington Building, Parks Road, Oxford OX1 3PD, UK. tamara.curnow@physiol.ox.ac.uk
Abstract:
There are 8 cycle/deg ripples or oscillations in performance as a function of location near Mach bands in experiments measuring Mach bands' masking effects on random polarity signal bars. The oscillations with increments are 180 degrees out of phase with those for decrements. The oscillations, much larger than the measurement error, appear to relate to the weighting function of the spatial-frequency-tuned channel detecting the broadband signals. The ripples disappear with step maskers and become much smaller at durations below 25 ms, implying either that the site of masking has changed or that the weighting function and hence spatial-frequency tuning is slow to develop.
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