Collocation Dictionary
Common collocations with perceptible in American Collocation
almost not
barely
hardly
scarcely
For a time progress was slow, in fact barely perceptible.
clearly
clearly
This research suggests that technology needs to have a clearly perceptible benefit before it will be adopted.
change
difference
effect
Even a fairly big jump in disk performance might not make a perceptible difference to the overall speed of your system.