INTERACTIVE LESSON 10
The 4 Types of EMF in Your Home
"EMF" is not a single radiation type. Explore the 4 distinct fields in every modern house: Radio Frequency, AC Magnetic, AC Electric, and Dirty Electricity.
STEP 1 OF 5: THE 4 DISTINCT EMF FIELDS
Choose a Field to Explore
Each EMF type has different sources, physical characteristics, units of measurement, and practical mitigation solutions.
Wireless Communications & Microwaves
Wi-Fi routers, smartphones, Bluetooth devices, cell towers, baby monitors, smart utility meters.
Radiates through air as electromagnetic waves; intensity drops rapidly with distance ($1/d^2$). Pulsed digital bursts.
Dedicated RF Meter (e.g. Safe and Sound Pro II, GQ-EMF 390, or TriField TF2 in RF mode).
Hardwire computers via Ethernet, turn off Wi-Fi routers overnight, maintain 3+ feet distance from phones.
Find the Hidden Fields in a Real Home
Click on any hotspot on the floorplan to inspect the specific field type emitted by that appliance or location.
Wi-Fi Router (Continuous 2.4/5 GHz Beacon)
The router emits pulsed RF beacons thousands of times per second. Power density is extremely high within 3 feet.
Match the Right Meter to the Right Field
No single cheap meter can measure everything accurately. Understand the measurement capabilities of each tool.
Safe & Sound Pro II
Specialized for high-speed digital RF peak bursts ($200\text{ MHz} - 8\text{ GHz}$).
TriField TF2
Versatile entry-level all-in-one meter measuring three distinct physical fields.
Greenwave / Stetzer Meter
Plugs directly into standard 120V/230V AC wall receptacles to measure dirty electricity line noise.
The 4-Step Practical Mitigation Protocol
Follow the proven Building Biology hierarchy to systematically lower EMF exposure without fear or unnecessary spending.
Measure First (Don't Guess)
Identify the exact source and field type using the appropriate meter. Avoid assuming where radiation comes from before taking baseline measurements.
Increase Distance (Zero Cost)
Apply the inverse-square law. Moving furniture, beds, and desk seating just 3 to 6 feet away from unshielded sources drops field strength by 90%+.
Eliminate & Hardwire
Switch desktop computers, printers, and streaming boxes to wired Ethernet. Disable unused Wi-Fi transmitters in router settings and put smart devices on timers.
Shield or Harmonize Residual Ambient Fields
For unavoidable ambient fields (such as neighboring apartment Wi-Fi or dense cell towers), apply targeted physical shielding (canopies/paint) or active scalar harmonization (Blushield).
Check Your Understanding
Test your knowledge of the 4 EMF types and measurement tools.
🎉 Lesson Complete!
You now understand the 4 distinct EMF fields, their measurement meters, and the practical mitigation hierarchy.
Read the complete lesson summary without interactions
Summary of Lesson 10: The 4 Types of EMF
1. Radio Frequency (RF): Emitted by wireless communications (Wi-Fi, Bluetooth, 4G, 5G). Measured in $\mu\text{W/m}^2$ with dedicated RF meters.
2. AC Magnetic Fields: Created by current flow in wiring, breaker panels, and motors. Measured in milligauss ($\text{mG}$). Solved by distance and electrical wiring code fixes.
3. AC Electric Fields: Created by voltage in unshielded wiring and appliance cords. Measured in $\text{V/m}$ or body voltage ($\text{mV}$).
4. Dirty Electricity (EMI): High-frequency voltage transients on electrical wiring caused by switch-mode electronics, solar inverters, and dimmers.
Sources and Scientific References
- Building Biology Institute (BBI) Guidelines — The 4 EMF fields and SBM-2015 exposure benchmarks.
- IEEE Standards Association — Electromagnetic compatibility (EMC) and power quality standards.