Yes, it has been recognized that ultrasonic sound can cause hearing damage. http://www.tinnitusjournal.com/detalhe_artigo.asp?id=109 http://www.tinnitusjournal

Yes, it has been recognized that ultrasonic sound can cause hearing damage. http://www.tinnitusjournal.com/detalhe_artigo.asp?id=109 http://www.tinnitusjournal.com/detalhe_artigo.asp?id=109 OSHA even sets standards for exposure & in fact my ultrasonic cleaner manual recommends wearing ear protection when in use. https://www.osha.gov/dts/osta/otm/noise/health_effects/ultrasonics.html https://www.osha.gov/dts/osta/otm/noise/health_effects/ultra...