Notch Filter: A special type of cut-only equalizer used to attenuate ( no boosting ) a narrow band of frequencies. Three controls: frequency, bandwidth and depth, determine the notch. Simplified units provide only a frequency control, with bandwidth and depth fixed internally.

 

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Notch Filter: A special type of cut-only equalizer used to attenuate ( no boosting ) a narrow band of frequencies. Three controls: frequency, bandwidth and depth, determine the notch. Simplified units pro . . . View Full Definition

Neutral Density Filter: Describes a gray camera filter which has an equal opacity to all the colors of the spectrum and so does not affect the colors in the final image. It is used to reduce the amount of light ent . . . View Full Definition

Notch: A crosswise groove at the end of a board.

Machine-Learning Filters: Filters run by machines that determine whether to block email based on algorithms that point to whether the message is likely spam.

Oil Filter: An Oil Filter filters the oil in the engine. Changing the oil and oil filter is one task that many riders do for themselves. Consult your owner's manual for recommended intervals and oil wei . . . View Full Definition

Low Pass Filter: A network of components which attenuate all frequencies above a predetermined frequency selected by the designer. Frequencies below cut-off are passed without any effect.

Gelatin Filters: Filters cut from dyed gelatin sheets and held in front of the lens or studio light.

Graduated Filter: Filter with a colored section, which gradually reduces in density toward the center of the filter. The rest of the filter is clear. Also referred to as a graduated filter

Heat Filter: Optical attachment made of thick infrared absorbing glass, used to absorb heat radiation from alight source without diminishing output.

High Pass Filter: An electronic filter of a type commonly incorporated in Crossover circuits that permits the passage of high frequencies while suppressing lower ones. The place in the frequency spectrum wher . . . View Full Definition