Sonification for skateboard

[samreid]

We have discussed adding a "click/clack" sound for the skateboard, so that the frequency of clicks/clacks is proportional to the speed of the skateboard. @ariel-phet do you want to do this for the next publication of Forces and Motion Basics?

Main questions:

1. Does the sound need to visually synchronize with the look of the "cracks" in the sidewalk?
2. How much should it sound like a real skateboard?
3. Does the sound change as a function of friction (on ice, etc.) or as a function of what is on the skateboard?

[ariel-phet]

@samreid - no, we should not include this on the next redepoly.

I think we only want to include such sonifiied representations in published sims after they have been researched and vetted.

[amanda-phet]

Deferring this for when the design of the sim has more dedicated time.