Radiofrequency radiation (RFR) is electromagnetic energy in the frequency range of 3 kHz to 300 GHz. This type of non-ionizing radiation is emitted by wireless devices and communication infrastructure.
Cell phones, WiFi routers, cell towers, smart meters, and Bluetooth devices all emit radiofrequency radiation as part of their normal operation.
Radiofrequency radiation, or RFR, specifically refers to the electromagnetic energy emitted when radiofrequency signals radiate from an antenna or device. While ‘radiofrequency’ describes the frequency range, ‘radiofrequency radiation’ emphasizes that this energy travels outward through space.
Put simply, whenever a device communicates wirelessly, it emits RFR. Your cell phone transmits RFR to connect with cell towers. Your WiFi router broadcasts RFR throughout your home. Even your car’s keyless entry system uses radiofrequency radiation.
The health conversation around RFR centers on two questions: thermal effects and potential non-thermal effects. At high power levels, RFR can heat biological tissue—this is the principle behind microwave ovens. Safety standards are designed to prevent this heating effect.
The more contested question involves whether lower-level RFR exposure—below the threshold for measurable heating—might affect biological systems through other mechanisms. Research in this area continues, with some studies suggesting effects on cellular stress responses, sleep patterns, and other biological markers.
In 2011, the International Agency for Research on Cancer classified radiofrequency electromagnetic fields as ‘possibly carcinogenic to humans’ based on studies suggesting increased glioma risk among heavy cell phone users.
For practical exposure reduction, the inverse square law is your ally: doubling your distance from an RFR source reduces your exposure by 75%. Using speakerphone, keeping devices away from your body, and turning off WiFi at night are common strategies people use to reduce daily RFR exposure.
