man beep () - ring the bell
NAME
beep - ring the bell
SYNOPSIS
beep ?percent?
DESCRIPTION
The beep command rings the keyboard bell. Percent is relative to the base volume of the keyboard bell and can range from -100 to 100 inclusive.
If percent is nonnegative then the bell volume is: base - [(base * percent) / 100] + percent If percent is negative then the bell volume is: base + [(base * percent) / 100] The default percent is 50.
EXAMPLE
beep
KEYWORDS
bell, beep