Your world may have noise in it you don’t even hear – but it’s still affecting you. Ultrasound.
And it might be disturbing enough that it’s actually making you sick.
Ultrasonic sickness – thanks to noises in public places we don’t even give a second thought to – like automatic doors, electrical appliances like freezers at the grocery store – they give off a hum.
Researchers says schools, libraries, museums, even pools and other indoor sporting facilities are all places where they measured the sound. Public pools is an area where many had complained of symptoms linked to ultrasonic sickness.
Those symptoms include nausea, dizziness, tiredness, and stomach pain.
Not everyone thinks it’s a real issue…and that we should be more concerned about what we CAN hear and control that.
See more details here….