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Feedback
- The transmission of current or voltage from the output
of a device back to the input, where it interacts with
the input signal to modify operation of the device.
Feedback is positive when it's in phase with the input
and negative when it's out of phase.
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Fiber
Optic Cable - Glass, plastic, or hybrid fiber
cable that transmits digital signals as light pulses.
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FireWire
- See IEEE 1394.
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FM
- Abbreviation for Frequency Modulated.
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Frequency - The number of cycles (vibrations)
per second. In audio, audible frequencies commonly
range from 20 to 20,000 cycles per second (Hz). In
video, frequency is used to define the image resolution.
Low-frequency video images depict large objects or
images. Higher frequencies depict smaller objects
(finer details).
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Frequency Response - A measure of what
frequencies can be reproduced and how accurately they
are reproduced. A measurement of 20 to 20,000 Hz ± 3dB
means those frequencies between 20 and 20,000 Hz can be
reproduced no more than 3 dB above or below a reference
frequency level.
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Full-Range - A speaker designed to reproduce
the full range (20 Hz to 20 kHz) of audio frequencies.
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