radio frequencies can be massively spaced but this doesn't mean they don't interfere. If they are the same octave then one can get them to interact and merge, a form of entraining to yield a final effective spectrum.
Lack of wave theory aside, it seems possible to have two frequencies produce another frequency that was previously unavailable-- lostmind, Jul 28 2008 Aren't you losing two frequencies to gain one ? Or are you trying to describe a way of using two frequencies already being used in such away as to magically make another frequency . You could encode/decode information in the other two frequencies .-- wjt, Jul 28 2008 I don't think any of us are on the same wavelength here. Maybe it's just a phase?-- 4whom, Jul 28 2008 random, halfbakery