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Critical Listening Skills for Audio Professionals by F. Alton Everest

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Their interrelationship

TalkTech
The program material we are interested in listening to or recording we shall call the signal. Any sound that interferes with enjoyment or comprehension of the signal is called noise. If the signal dominates, excellent. But if noise dominates, the signal is useless.

SIGNAL…desired NOISE…undesired

The relative strength of the signal compared to that of the noise is a very important factor in all communication systems. We even have a name for it: the signal-to-noise ratio. If the desired signal dominates, the signal-to-noise ratio is high, and all is well. To get specific, let us designate the following musical selection as our signal:

It will be convenient for us to use white noise to interfere ...

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