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- http://www.embedded.com/design/connectivity/4401019/1/Capacitive-sensing-for-advanced-user-interfaces
- 2. Larry K. Baxter (1996). Capacitive Sensors. John Wiley and Sons. p. 138. ISBN978-0-7803-5351-0.
- http://www.capacitive-sensing.com/ More about capacitive sensors. Math and applications.
- http://www.analog.com/library/analogdialogue/archives/40-10/cap_sensors.html
Acoustic camera
What is acoustic camera?
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