Measuring signals swamped by noise

This gentleman’s, though very advanced, are also very informative. In this one he discuss a device called a locking amplifier and explains how it can be used to measure signals that are well below the noise level. He then uses it to measure the speed of sound and current levels in the atto amp range.

Bet he gets a few viewers to send SRS nastygrams, and the next time he asks, they may well decide itvis worthwhile.

The guy is addicted to high end test gear. Every time I watch one of his videos he cranks my envy switch to eleven.

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