Bob Masta is Chief Engineer of Interstellar Research and developer of the DAQARTA (Data AcQuisition And Real-Time Analysis) shareware package. For the past 20 years he has been involved in design and development of data acquisition systems for auditory research, and has supplied custom hardware and software to leading university laboratories. Bob has degrees in Electrical Engineering and Bioengineering and is a licensed Professional Engineer. (He also holds a patent for an electronic ignition controller from a prior incarnation as an automotive engineer.) If you would like to ask Bob a question or simply give comment, click here.

Dither: Making a Lemon Into Lemonade or Nature Finally Gets Genenerous Noise is usually considered an "evil" in any measurement system, but with digitized data a certain amount of noise is a desireable thing: It actually increases the resolution of measurements when used in conjunction with synchronous averaging. If noise is specifically added for this purpose, it's called dither. Often, though, you may be able to take advantage of noise that is already present in the signal to provide a "self-dither" ... a case of making a lemon into lemonade.   Click here to read the complete article

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