Sefrijn onderzoek

[mosquito]

www.sefrijn.nl/other/Bachelor_Opdracht_ ... angen.pdf‎

The results of the examination are now available. The auditors were not able to cer-
tify this device as completely safe. The risk to the target group of teenagers and young
adults is relatively low. They can leave the area when they hear the sound. On the
other hand small children and infants are especially at risk, due to lengthy exposure
to the sound, because the adults themselves do not perceive the noise. Moreover, the
ultrasound affects not only hearing. Disruption of the equilibrium senses, as well as
other extra-aural effects are well known. With the sound levels that can be reached by
the device, the onset of dizziness, headache, nausea and impairment is to be expected.
This is not the limit of the total risks to safety and health.”