Dawn simulator alarm clock

摘要

A combined light and audio source comprising: a light controller to control the brightness of the light and audio source volume controller to control the audio source volume. The audio volume is controlled in association with the light brightness such that a change in said light brightness is followed by a change in said audio volume. The brightness and volume may be increased or decreased. Preferably the volume changes over a shorter period than the brightness. The invention is for particular use with an alarm clock.