Citation

Brown B, Cole BL. Aust. Road Res. 1969; 4(1): 35-49.

Copyright

(Copyright © 1969, Australian Road Research Board ARRB)

DOI

unavailable

PMID

unavailable

Abstract

Experiments concerning the effects of various configurations of background noise are reported. There appear to be two effects, one luminance-dependent which can be described in terms of an equivalent background luminance, and the other 'confusion' effect. The results are reported within ght framework of a theoretical model for noise. If a signal has an intensity adequate for daylight use then it is concluded that for the alerted observer the array of irrelevant lights of the kind found as a background to signal lights in the urban environment at night is unlikely to have a significant effect on its conspicuity.

Language: en