Related Words

Filter Feeders: Organisms such as sponges that feed by removing food from water that filters through their body.

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.

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.

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 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

Ingestive Feeders: Animals that ingest food through a mouth.

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

Fluid Feeders: Animals such as aphids, ticks, and mosquitoes that pierce the body of a host plant or animal and obtain food from ingesting its fiuids.

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