D-Ring
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D-Ring - A metal mounting device, shaped like a D, used in conjunction with hanger wire to mount baffles.
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Cycles per second
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Cycles per second - The frequency of an electrical signal or sound wave, measured in Hertz (Hz).
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Cycle
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Cycle - A complete positive (forward) and negative (backward) movement of a vibration corresponding to a high and low pressure wave.
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Cutoff frequency
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Cutoff frequency - The lowest frequency above which the normal incidence sound absorption coefficient is at least .990 for an anechoic wedge, or set of wedges,
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Critical distance
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Critical distance - The distance from a sound source at which the direct energy (energy radiated directly from the source) is equal to the reverberant energy (radiated from walls, floor and ceiling).
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Constructive Interference
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Constructive Interference - The addition of two waveforms of similar phase. Constructive interference is responsible for the production of standing Wavesin which a signal and its successive reflections are continually added to one another. The opposite is destructive interference.
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Coloration
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Coloration - A term used to indicate audible alterations to sound due to its environment. Coloration can be a result of standing Wavesor room resonances
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Cocktail Party Effect
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Cocktail Party Effect - The ability of a listener to focus attention on a single talker among a mixture of crowd conversations and background noise while, at the same time, ignoring speech from other locations. Understanding is possible due to the ear / brain discrimination of unwanted sound as well as lip reading and body langauge.
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Comb filter
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Comb filter - A distortion produced by combining an acoustical (or electrical) signal with a delayed replica of itself (offset in time). The result is constructive and destructive interference that results in peaks and nulls being introduced into the frequency response.
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Ceiling Cloud
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Ceiling Cloud - An acoustical panel suspended in a horizontal position from ceiling or roof structure.
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