Helmholtz resonant....a little help

[Guest Lors]

I am looking for a science project. I was suggested to do a project about the helmholtz resonant....its a project that deals with acustics. Its a spherical container with two little spouts that help project beter frequency or something....i cant find if there is a special mathematical explanation for the construction or how far apart one container should be set from another ina building....

Im new to this site.....so if anyone has a notion of acustics I would appreciate the help....also the cost of making each apparatus.....

Thank you

Lors