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EMF Glossary Definition


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“Frequency” in the context of electricity, Electromagnetic Fields (EMF), and wireless communication, can be thought of as the number of times something happens in a second. Specifically, it refers to how often the waveform of an electric current or an electromagnetic wave repeats itself over a set period of time. This is usually measured in hertz (Hz), where one hertz equals one cycle per second.

In electricity, frequency is important because it determines the number of times the current changes direction per second. Most household electricity in many countries is at 50 or 60 hertz, meaning the current changes direction 50 or 60 times per second.

In the context of EMF and wireless communication, frequency refers to the number of electromagnetic waves that pass a point in one second. Different types of electromagnetic waves (like radio waves, microwaves, visible light) have different frequencies. For example, FM radio waves are in the megahertz range (millions of hertz), while Wi-Fi typically operates at gigahertz frequencies (billions of hertz).

The frequency of electromagnetic waves is crucial in wireless communication as it determines the properties of the waves, like how far they can travel and what materials they can pass through. Different frequencies are used for different types of communication: for instance, lower frequencies for long-range radio communication and higher frequencies for cellular networks and Wi-Fi.

Understanding frequency helps in grasping how various electronic and communication devices work and interact with each other, and with the environment around us.

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About the Author

R Blank is the CEO of Shield Your Body, which he founded in 2012. With hundreds of thousands of customers in over 30 countries, and having been interviewed on platforms including Dr. Phil, ABC news television and ElectricSense, R is an internationally followed expert on issues of EMF, health and safety. He also hosts “The Healthier Tech Podcast”, available Apple, Spotify and all major podcasting platforms. In the past, he served on the faculty at the University of Southern California Viterbi School of Engineering as well as the University of California, Santa Cruz. Previously, R ran a software engineering firm in Los Angeles, producing enterprise-level solutions for blue chip clients including Medtronic, Apple, NBC, Toyota, Disney, Microsoft, the NFL, Ford, IKEA and Mattel. He has spoken at conferences around the world, including in the US, Canada, New Zealand and the Netherlands, and he is the co-author, along with his father Dr. Martin Blank, of ‘Overpowered‘ from Seven Stories Press about the science of health effects of EMF radiation. He has an MBA from the UCLA Anderson School of Management and received his bachelor’s degree, with honors, from Columbia University. He has also studied at Cambridge University in the UK; the University of Salamanca in Spain; and the Institute of Foreign Languages in Nizhny Novgorod, Russia. Read more about R and SYB or connect with R on LinkedIn.

Have a Question?

I take pride in designing great, effective products, based on real, measurable science – AND taking the time to ensure that each and every one of you has the information you need to understand EMF and make informed decisions.

So if you have a question, just email me and ask.

R Blank