Crossword clues for headroom
headroom
Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Headroom \Head"room`\ (-r[=oo]m`), n. (Arch.) See Headway, 2. [Mostly Brit.]
Douglas Harper's Etymology Dictionary
Wiktionary
n. 1 The vertical clearance above someone's head, as in a tunnel, doorway etc. 2 (context electronics English) The ability of a system to reproduce loud sounds free of distortion; dynamic headroom. 3 The distance between the actual performance of an algorithm and its maximum possible performance.
WordNet
n. vertical space available to allow easy passage under something [syn: headway, clearance]
the capacity of a system to reproduce loud sounds without distortion [syn: dynamic headroom]
Wikipedia
In digital and analog audio, headroom refers to the amount by which the signal-handling capabilities of an audio system exceed a designated nominal level. Headroom can be thought of as a safety zone allowing transient audio peaks to exceed the nominal level without damaging the system or the audio signal, e.g., via clipping. Standards bodies differ in their recommendations for nominal level and headroom.
Headroom or HeadRoom may refer to:
- Vertical clearance, in engineering, the maximum distance overhead (the difference between the structure gauge and the loading gauge)
- Headroom (audio signal processing), the difference between the nominal signal value and the maximum undistorted value
- Headroom (photographic framing), in camera work, the space between the top of the head and the upper frame limit
- Headroom (Bleu album), an album by alt-rock musician Bleu
- Headroom (Don McLean album)
- Head Room or Headroom, alternate name for Direct to Disc (FM album)
- Max Headroom (disambiguation), fictional artificial intelligence character, and associated appearances
- Helix HeadRoom, DOS memory management software by Helix Software Company
Headroom is an album by American singer-songwriter Don McLean, released in 1991.
__NOTOC__ In photography, headroom or head room is a concept of aesthetic composition that addresses the relative vertical position of the subject within the frame of the image. Headroom refers specifically to the distance between the top of the subject's head and the top of the frame, but the term is sometimes used instead of lead room, nose room or 'looking room' to include the sense of space on both sides of the image. The amount of headroom that is considered aesthetically pleasing is a dynamic quantity; it changes relative to how much of the frame is filled by the subject.
One rule of thumb taken from classic portrait painting techniques, called the " rule of thirds", suggests that the subject's eyes, as a center of interest, are ideally positioned one-third of the way down from the top of the frame.
Moving images such as movie cameras and video cameras have the same headroom issues as still photography, but with the added factors of the movement of the subject, the movement of the camera, and the possibility of zooming in or out.
Perceptual psychological studies have been carried out with experimenters using a white dot placed in various positions within a frame to demonstrate that observers attribute potential motion to a static object within a frame, relative to its position. The unmoving object is described as 'pulling' toward the center or toward an edge or corner. Proper headroom is achieved when the object is no longer seen to be slipping out of the frame—when its potential for motion is seen to be neutral in all directions.
Headroom changes as the camera zooms in or out, and the camera must simultaneously tilt up or down to keep the center of interest approximately one-third of the way down from the top of the frame. The closer the subject, the less headroom needed. In extreme close-ups, the top of the head is out of the frame, but the concept of headroom still applies via the rule of thirds.
In television broadcast camera work, the amount of headroom seen by the production crew is slightly greater than the amount seen by home viewers, whose frames are reduced in area by about 5%. To adjust for this, broadcast camera headroom is slightly expanded so that home viewers will see the correct amount of headroom. Professional video camera viewfinders and professional video monitors often include an overscan setting to compare between full screen resolution and "domestic cut-off" as an aid to achieving good headroom and lead room.
One of the most common mistakes that casual camera users make is to have too much headroom: too much space above the subject's head.
Usage examples of "headroom".
Overhead rammers, sponges and wormers were held up in racks, restricting even more the limited headroom.
A large and fairly comfortable cabin was built into the afterpart of the ship, partly lowered into the hold to give it more headroom without rising too high above the deck.
Just getting into one of those backbreakers took a certain amount of gymnastic skill, and the headroom was so small it was all but impossible to turn over.
We had three tanks, four armored personnel carriers modified into fighting vehicles (ACAVs), an APC with added headroom and radios (a command track), and a light recovery vehicle that we called a cherrypicker though it had just a crane, not a bucket.
The effect on the French soldiers would be terrifying: the fact they weren't used to the half-darkness and low headroom of a frigate's gun deck put them at a disadvantage.