====== nosound ======
<code c>
void nosound( void );
</code>

===== description of nosound =====
turn off the PC speaker.

<code c>
#include<stdio.h>
#include<dos.h>

int main(void)
{
   sound(400);
   delay(1000);
   nosound();

   return 0;
}

</code>

==== output of nosound c example ====
    silence :D