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Critical Listening Skills for Audio Professionals by F. Alton Everest

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Pure tones and random noise

TalkTech
To deal effectively with various audio systems, we must have a thorough understanding of the frequency spectrum of signals to be handled by these systems. Speech and music, our usual signals, are so very complex it is often necessary for us to break them down into tones or narrow bands to understand them better.

Definition

Spectrum: the distribution of the sound energy throughout the audible frequency range

Example:

Spectrum of the sound of typical rock music
The frequency range of audible sound is commonly taken as 20 Hz to 20,000 Hz.

Definition

Frequency: The number of cycles per second ...

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