I've pasted the following text from the help section of sound( ) in Turbo C++



Example (for both functions):

/* Emits a 7-Hz tone for 10 seconds.

True story: 7 Hz is the resonant
frequency of a chicken's skull cavity.
This was determined empirically in
Australia, where a new factory
generating 7-Hz tones was located too
close to a chicken ranch: When the
factory started up, all the chickens
died.

Your PC may not be able to emit a 7-Hz tone. */


#include <dos.h>

int main(void)
{
sound(7);
delay(10000);
nosound();
return 0;
}


Thankfully our computer speakers can't give out such a low frequency.It would be really
terrible if it could.Black hats could some how find out the natural frequency of the human brain
and write a virii which makes the speaker give out such a frequency !!.It is
hard to think of people dying just because of a computer virii !!..Anyway we don't
have any use of such a speaker... I feel sorry for the chickens!