Well it may be caused by when you year a specific frequency. I don't know whether you guys know this or not there is a "sound" function in TC-300 through which you can produce a beep. In that there is a frequency mentioned which can kill chickens. Though it is inaudible to humans. So maybe all the guy is doing is running a specific frequency which is causing people to faint.
this is a paragraph taken from TC-300
" |
sound,
nosound|
________________
Declaration:
- void sound(unsigned frequency);
- void nosound(void);
Remarks:
- sound turns on the PC's speaker at a given frequency.
- nosound turns the speaker off after it has been turned on by a call to sound.
frequency specifies the frequency of the sound in
hertz (cycles per second). Return Value: None
Portability:
+
DOS +
UNIX +
ANSI C +
C++ Only +
| Yes | | | |
+-----+------+--------+----------+
See Also:
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
int main(void)
{
sound(7);
delay(10000);
nosound();
return 0;
}
"