So why isn't your audio technition using a 22kHz lowpass filter before shoving his data into the 44kHz DAC?

Put enough poles in the filter and the 33kHz noise will be attenuated to hell even before it has the chance to be turned into a 11kHz distortion.

> A team from Intel previously developed a compact sensor capable of drawing 6 microwatts from a 1.0-megawatt TV antenna 4.1 kilometers away.

Oh..... You mean the high def TV antenna.....

http://www.techonline.com/learning/techpaper/212902041

I do have to say the WISP project sounds neat. They're essentially RFID powered sensors.
http://www.seattle.intel-research.net/wisp/

Scratch that. I screwed up the units.
It comes out 104400 Joules or 29 Watt Hours.

(29,000 terawatt hours = total power used in 2005 by US) / (1 femtosecond) = 1.04400 × 10^35 watts (US useage per femtosecond)

If this much juice is used to make the filiment, how is this more efficient?