I'm looking for a Sound Hertz Meter/Graph?

What you're looking for is known as a spectrum analyser. The best ones are external devices but software ones using a sound card input do exist, e.g. Analyzer2000 at a href="http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=6303" rel="nofollow"http://www.dxzone.com/cgi-bin/dir/jump2.…/a