glossary of terms for the audiophile |
 list of audio terminology
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Octave: An octave is a doubling or halving of frequency. 20Hz-40Hz is often considered the bottom octave. Each octave you add on the bottom requires that your speakers move four times as much air!
Ohm: A unit of electrical resistance or impedance.
Ohm's Law: The basic law of electric circuits. It states that the current [I] in amperes in a circuit is equal to the voltage [E] in volts divided by the resistance [R] in ohms; thus, I = E/R.
Opaque Projector: Similar to an overhead projector, with the added unique feature of being able to display three dimensional objects, such as book covers, photographs, and single sheets of paper.
Out of Phase: When speakers are mounted in reverse polarity, i.e., one speaker is wired +/+ and -/- from the amp and the other is wired +/- and -/+. Bass response will be very thin due to cancellation.
Output: The sound level produced by a loudspeaker. The sound level produced by a loudspeaker.
Overload: A condition in which a system is given too high of an input level. A common cause of distortion or product failure.
Overtones: See Harmonics.
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