Ears

It should come as no surprise that playing loud music straight into your ear canals puts your hearing in grave danger. However, according to research from the University of Arkansas for Medical Services, hearing loss can still occur even at modest volume levels. According to Dr. Allison Woodall, rather than the actual sound waves, using a phone for more than an hour a day can impair a listener's capacity to hear noises between 2,000 and 8,000 hertz, which encompasses a wide spectrum of human speech.

For people whose lifestyles make it impossible to simply decide to use a smartphone less, there are ways, just like with the other categories. Woodall urged people to utilize speaker phones or the hands-free feature to keep their phones away from their ears. Furthermore, according to studies, wireless bluetooth earpieces can reduce electromagnetic exposure by as much as 1,000%. According to Reuters, AirPods are an equally secure alternative.