Hedy's folly : the life and breakthrough inventions of Hedy Lamarr, the most beautiful woman in the world by Richard Rhodes.

I love this book because we don't often hear about super intelligent women and their inventions particularly ones who are also movie stars!
Presents the life of legendary film star Hedy Lamarr, including her involvement in the breakthrough invention spread-spectrum radio alongside composer George Antheil. c2011
Subjects:
Lamarr, Hedy, 1913-2000.
Actresses -- United States -- Biography.
Motion picture actors and actresses -- United States -- Biography.
Spread spectrum communications.

WHAT IS SPREAD-SPECTRUM RADIO? Spread-spectrum techniques are methods by which a signal (e.g. an electrical, electromagnetic, or acoustic signal) generated in a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth. These techniques are used for a variety of reasons, including the establishment of secure communications, increasing resistance to natural interference, noise and jamming, to prevent detection, and to limit power flux density (e.g. in satellite downlinks).
from wikipedia http://en.wikipedia.org/wiki/Spread_spectrum