Who doesn't have a mobile phone or MP3-player and who doesn't prefer energy-efficient bulbs? But this also comes with risks and are any threshold values imposed by the law for this purpose? And what can we do ourselves to further limit the risk? Besides, what is electromagnetic radiation and how does it differ from sound?
Electromagnetic radiation and sound are both physical (environmental) factors that can affect our health. The physicists consider both of these to be waves. That is why the same terminology is used, such as intensity, frequency, wavelength. Yet, these are completely different phenomena.
Electromagnetic radiation is the propagation through space of electrical and magnetic waves while sound is the result of small changes in the air pressure that propagate through the air. We can sometimes see electromagnetic radiation (as light) or feel it (as warmth) while we can only hear sound. Read below which forms of electromagnetic radiation and sound exist and how we can prevent and limit health risks associated with it.