This causes the sound to be more uniform in the plenum space. A design integrating all three components in a cohesive system will create a superior acoustical environment, resulting in enhanced aesthetics, increased productivity and higher employee morale. Noise masking is a proven technology enhancing the acoustical environment by providing a higher degree of privacy at nominal cost. If the design criteria unique to VDTs are not incorporated into the solution, the adverse effect on employee health can outweigh the productivity advantages of using computers in the workplace. Call center environments require two separate, but complementary lighting systems, including uniform ambient lighting for VDTs and task lighting for hard copy reading and writing.
Terminals act as mirrors that reflect ceiling glare causing eye strain.
Therefore, a uniform light level at the ceiling is important. By far, the best ambient lighting system to satisfy VDT design criteria is indirect lighting, usually mounted between and 18 and 24 inches below the ceiling and shining upward. If properly designed, the result is a uniform luminance level on the ceiling, as well as a uniform 25 to 30 foot candle level of illumination at the work surface. More conventional, and far more common, lighting solutions include ceiling-mounted fluorescent fixtures with either parabolic or prismatic lenses. Although parabolic lenses are superior to prismatic lenses, both produce uneven lighting levels on the ceiling that reflect off VDTs and cause eye strain.