  Traditionally, clinicians use tuning forks as a binary measure to assess
vibrotactile sensory perception. This approach has low measurement resolution,
and the vibrations are highly variable. Therefore, we propose using vibrations
from a smartphone to deliver a consistent and precise sensory test. First, we
demonstrate that a smartphone has more consistent vibrations compared to a
tuning fork. Then we develop an app and conduct a validation study to show that
the smartphone can precisely measure a user's absolute threshold. This finding
motivates future work to use smartphones to assess vibrotactile perception,
allowing for increased monitoring and widespread accessibility.
