I'm not sure if this is the right place to post this link but it seems to me that certain people here would appreciate the link and find it useful in some way. The pure tones go from 1HZ all the way up to 20,154HZ. May be useful in a number of ways. What I liked about it, apart from other things I have been experimenting with in relation to resonant frequencies, is that there is also a drop down menu which will show you exactly what the HZ is for a given musical note. Anyway, here is the link:
http://plasticity.szynalski.com/tone-generator.htm
Take care,
Rolland
http://plasticity.szynalski.com/tone-generator.htm
Take care,
Rolland