# Synchronizing Sound to a Physical Motion

1. Sep 7, 2009

### doggynono

I am not a physicist or a mathematician but I would appreciate if one of you talented people could help me. I also do not know if I am posting this question in the right area

I am interested in developing an exact formula for synchronizing sound to a physical motion.

Video taped images are recorded at 29.97 frames per second. I will us a golf swing as an example. If I count the frames of a golf player’s swing for example I find that our example golfers back swing is 24fps his down swing is 8fps and his follow through is 18fps. My golf swing has the same parameters 24, 8, 18 fps. This is where my problem begins. The total time from the beginning to the end of both swings 1.668 sec.

When I generate a sound with tones that rise and fall to simulate a golf swing and synch the sound that is exactly 1.668 sec long to the example golf swing to the naked eye is synchronized. Since my parameters where the same I assumed that the same tone would synchronize to my golf swing. It wasn’t even close. After thinking about it, I found that example golf swing is longer and covers more distance in the same amount of time therefore the tones must rise and fall faster but still have the exact total time.

Is there a formula (which I don’t believe exists) or could a formula be developed that could calculate this into a measurement that could be used to generate an accurate set of tones or frequencies that would match the physical motion.

Any help on this would be greatly appreciated.

Thank You One and All