Start on movement

In this mode the Sonic Timer begins to time the runner when his/her hand or foot has been lifted from the switch pad at the starting position.  When the runner passes a Sonic beam the timing will stop. Start on Movement mode is unique among the three modes in that it is the only mode where the runner initiates the start of timing. In sound or light mode timing begins when the auditory or visual signal occurs (corrected for distance to the runner of course) and so the runners reaction time to these type of signals is captured in addition to run speed.


As Start on Motion mode will measure only run speed it provides a useful benchmark that allows the user to get a good approximation of a runners reaction times for auditory and visual signals.

Assuming run speed does not change between measurements you can calculate reaction to auditory and visual cues very simply:


track runner




Hand Switch pad







Sonic Timer handheld annotated diagram

Timely feedback = motivation = better results

Whatever the application both player, coach and/or trainer gets instant feedback and motivation to train harder to increase speed, sharpen reactions to audio, and visual stimuli, increase vertical jump height, and develop explosive leg power.  Many sports organizations and coaches recognize performance information gives a competitive advantage and results in increased performance from their athletes.  With the Sonic Timer, you can now receive accurate measurements and readings for your particular drill application.  This is also an excellent tool for measuring plyometric training progress.


  • Measure sprints and dashes
  • Measures player's reaction to visual stimuli
  • Measures player's reaction to audio stimuli
  • Measures player's time based on movement alone
  • 1/100th second accuracy
  • User friendly
  • Wireless
  • Usable indoors or out
  • Upgradable for making Just Jump measurements