Why modulate the "data" sinusoid onto a "transmitter" sinusoid? (Sorry about the simple question but this stuff isn't exactly my specialty) From howstuffworks.com ... Why can't you just send the sine wave produced by a person's voice directly through the air (or whatever channel you are using) instead of encoding the voice onto transmitter sinusoid? I am guessing it is because the sinusoid of a higher frequency can travel farther without attenuation. If so, why is this? Also, unrelated... What exactly is "static" and why is FM immune to it? Thanks!