10-06-2012, 08:17 PM
(10-01-2012, 12:37 AM)Shannon Wrote: Abi, it is in fact possible to cause headaches using ultrasonic subliminals, and especially when using 5G ultrasonics, especially if the volume is too high or there is too much exposure time. Too much exposure time causes headaches by causing your brain to try too hard to get enough glucose and oxygen to keep up, and causing a pressure headache. The headaches from too high a volume and too much 5G exposure both should dissipate very rapidly when the program is turned off, usually within 5 to 7 minutes on their own.
Too much volume can also cause nausea.
Shannon, with regards to the use of ultrasonics on speakers audio test file is available which could be used to detect the compatibility of the speakers to play at that required frequency but to calibrate the volume we entirely depend on the masked ones and match it with ultrasonic.
In standard terms, if I happen to calibrate using a decibel meter/sound level meter or so, what would be the ideal volume in decibels to play ultrasonic on speakers 2-5 feet away? And what would be the threshold of danger level. I'm asking this because when I play the ultrasonic using earphone it is ok but when played on speakers it causes something very unusual feeling which is difficult to describe but some mental pressure, like my internal temperature is increasing or so....may be nausea, not sure..?
