Variable: ring-bell-function
ring-bell-function is a customizable variable defined in terminal.c.
Value
nil
Documentation
Non-nil means call this function to ring the bell.
The function should accept no arguments.
Probably introduced at or before Emacs version 20.1.
Source Code
// Defined in /usr/src/emacs/src/terminal.c
DEFVAR_LISP ("ring-bell-function", Vring_bell_function,
doc: /* Non-nil means call this function to ring the bell.
The function should accept no arguments. */);