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Analyze signals octave by octave.(Brief Article)
Test & Measurement World
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April 15, 2001|
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COPYRIGHT 2001 Reed Business Information, Inc. (US). This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group.
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Although it gives less detail than spectrum analysis, octave analysis better emulates how we perceive sound.
Power-spectral plots generated by frequency sweeps or fast Fourier transforms (FFTs) can show you a signal's frequency content, but sometimes an FFT provides more detail than you need. If you design and test audio equipment or electromechanical devices and aren't interested in detail as much as you are in representing a person's hearing, octave analysis (or fractional octave analysis) may be a better option.
Octave analysis displays a signal's ...
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