Volume control system and method of volume control for portable computer

摘要

A system for adjusting a sound signal output to a speaker of a portable computer based on an amount of background noise external to the personal computer. A noise sensor senses the external noise and a micro controller calculates an average of the external noise for a predetermined period of time and adjusts a volume level controller based on a predetermined volume set up table which lists volume levels corresponding to levels of the external noise. Alternatively, the micro controller calculates an average noise level for a current predetermined period of time and adjusts the volume level controller based on comparing the current calculated average noise with a calculated average noise for a previous predetermined period of time. If the external noise increases, the output sound signal is increased and if the external noise decreases, the output sound signal is decreased.