Ultrasound exposure could be making people ill, study finds

University of Southampton research finds public places can feature high frequency sounds beyond occupational health limits

Exposure to high frequency sounds beyond the range of human hearing from public address systems, loudspeakers and door sensors in public places could be making people feel ill, research suggests.

Increasing exposure to ultrasound in the air was recorded in railway stations, museums, libraries, schools and sports stadiums in which it is claimed people have complained of nausea, dizziness, migraine, fatigue and tinnitus.