Chapter 15
audio conferencing
a conference between two or more sites using only voice transmissions
amplifier
a device that enable sound signals to be intensified
computer projection panel (LCD)
a device that projects the image on a computer monitor onto a screen. the self contained unit, which contains liquid crystal display panel, light source, and lens, works with both pc and mac computers and dvd, vcr, and digital HDTV signals
fast fold screen
a large screen with a frame. the legs of this screen are attached at the sides to allow the screen to be folded down into a small case for storage (some fast-fold screens are also suspended about the viewing area) most popular of large viewing screens, available in sizes up to 30 feet high
lavaliere microphone
a microphone that hangs around the neck, leaving the hands free. also cal a lapel, neck, or pendant microphone
unidirectional microphone
a microphone that picks up sounds from only one direction. used for speeches, it is different from omni-directional devices, which pick up sound from all directions
reader board
a sign, either printed or displayed on a video screen, that lists the times and locations of a groups events
profile spots
adjustable spotlights used to light lecterns, signs, and areas that need a tightly focused pool of light
virtual conferencing
any meeting at which people at two or more distant locations are linked using video, audio, and data for two way communication via satellite communications or the internet. parties see and hear each other via tv screens or computer monitors and audio speakers
safelock stand
audiovisual equipment stand with four adjustable telescoping legs
laser pointers
compact instruments consisting of a visible light laser. used for pointing out features on a projected visual display
audiographic conferencing
conference that combines visual capabilities with voice transmissions
in house contractor
contractor retained by a facility to provide on site services as needed. in some cases planners ae not required to use their services, but may be charged a surcharge or facility fee for using outside contractors to provide the same service
dissolve unit
device that activates fade-in and fade out slides, can be used with several projectors. used to create a "seamless" slide presentation
monitor
device used to view a video or computer image
receivers
devices that convert electric currents or waves into visible or audible signals. similar to a monitor, but with poorer picture quality
keystoning
distortion of a projected image, the image is wider on the top and narrower on the bottom. tilting the top of the screen can correct the problem, and many data projectors allow the operator to tilt the lens to correct keystoning
xenon bulbs
extremely high intensity lamps that are replacing carbon arc light sources in follow spots and long distance projectors
roving microphone
hand microphone, with or without cord, that can be moved easily through an audience to take questions
DLP projector (digital light projection)
high-end projector with extremely high light (up to 15,000 lumens) and scan output. most commonly used for very large screen and room applications
flip charts
large pads on tripod stand. used by speakers for illustrations and drawings
ambient light
level of illumination from natural lighting sources already existing in an environment
intelligent lighting
lighting instruments that can be computer-controlled to move light around the room and project color and patterns on screens, scenery, walls, or the floor
floodlights
lights designed to provide general illumination
standing microphone
microphone attached to a metal stand placed on the floor. can be adjusted for angle and height. also called a floor microphone
table microphone
microphone attached to a small stand placed on a table, desk, or lectern
carousel projector
most popular 2" by 2" (35 mm) slide projector. projects images from slides in mounts measuring 2 by 2 inches, presorted in round trays
follow-spots
movable lights used to highlight the speaker or performance
rearview projection
movie, slide, or computer image projected from a projector positioned behind the screen onto the back of a screen placed between the viewer and the projector. also called back projection
web conferencing
multiple participants take part in an online, real time meeting
translucent rear-projection screen
plastic screen with a special gray coating that allows images to be projected from behind the screen and viewed by the audience in front
skirting
pleated or ruffled draping used on audiovisual stands and stagings. also used to drape buffet, reception, and head tables for food and bev functions
tripod screen
portable projection screen with three folding legs and a pull up surface supported by a rod on the back. usually not larger than 10-12 feet
easel
portable three legged stand with a rack that is used to hold signs, boards, posters, charts, cork boards, magnetic boards, or other objects
gobo patterns
possibly derived from "go between", gobos are metal plates perforated with a pattern of holes to produce a projected image or outline, such as a corporate logo, when placed in front of a light (more sophisticated gobos rotate to create moving patterns) gobos can also be made of glass that contains colored patterns
overhead projector
projects a transparency onto a screen. speakers can write on transparencies as they are projected
multimedia
refers to the use of two or more audiovisual devices for a presentation
mixer board
regulates the sound from multiple microphones. also called a sound board
matte surface screen
screen having a flat or matt white finish that does not reflect as effectively as a glass-bead screen but can be viewed from virtually all front angles
glass-beaded screen
screen on which the surface is covered with tiny glass beads that reflect a bright image back at the audience but have a narrow viewing angle
lenticular screen
screen with a silver-colored finish that has brighter reflective characteristics than a matte screen and a wider viewing angle than a beaded screen
digital signs
signage that features electronic displays rather than printed copy
computer data projector
similar to LCD panels used with an overhead projector, except it is a self-contained unit and uses its own light source to project the computer image onto the screen
cordless/wireless microphone
small, portable microphone that operates without any direct electrical connection. often used when take questions or comments from the audience
simultaneous interpretation
the interpretation of the presentation into another language while the speech is in progress
video satellite conferencing
two way, full motion, full color, interactive electronic form of communication. various transmission technologies can be used to link groups of people at two or more communications for face-to-face meetings, seminars, or conferences