RESEARCH RESOURCES
Explore shielding test methods, phone accessories, Faraday storage, product claims, public-health guidance and measurement documentation.
INTERACTIVE LESSON & SIMULATOR
Explore the 10,000,000-fold logarithmic gap between official thermal heating guidelines and non-thermal biological thresholds (SBM-2015).
TEST METHOD · PUBLIC SUMMARY / PAID STANDARD
The published scope describes testing flat materials under defined far-field conditions. Useful when reading fabric or panel reports; it does not certify a finished garment or installed room. The public scope was checked; the full standard was not reviewed.
OUR READING GUIDE
Questions to ask about the tested sample, frequencies, geometry and limitations. This is our editorial checklist, not an independent laboratory study.
TEST METHOD · PUBLIC SUMMARY / PAID STANDARD · INACTIVE-RESERVED
The published scope covers measuring the electromagnetic shielding effectiveness of enclosures using a defined test procedure. IEEE has since marked this edition (and its 2013 small-enclosure companion, 299.1) inactive-reserved, so treat it as a historical reference for test methodology, not a currently maintained standard. It also answers a narrower question than "does this product block EMF" — check what was tested, at which frequencies, and under what geometry before applying it to a garment, panel or room. The public scope was checked; the full standard was not reviewed.
CONSUMER GUIDANCE · 2011
Consumer guidance about partial shielding claims and possible effects on phone operation. This historical guidance is not a test of every currently available case.
TECHNICAL GUIDANCE · 2014
SP 800-101 Rev. 1 addresses mobile-device forensics, including radio isolation. Relevant background for shielding containers; not a health-benefit study or a consumer product endorsement.
OFFICIAL GUIDANCE
Explains what SAR measures, how the FCC tests devices, and how to look up your own phone's reported value. SAR describes RF energy absorption under a specific test protocol — it is not a measure of a shielding accessory's effect, and a lower SAR does not by itself indicate lower real-world exposure during actual use.
CLAIM-SUBSTANTIATION GUIDANCE · 2022
Explains how supporting evidence should match an advertised health claim. Useful for evaluating the kind of evidence requested from a seller; not product-specific proof for a neutralizer, garment or shield.
OUR READING GUIDE
A framework for defining the claimed outcome and reviewing matching evidence. We have not completed a product-specific evaluation of Blushield or other neutralizer models.
FTC ENFORCEMENT ACTION · 2002–2003
A concrete precedent, not a general warning: the FTC charged sellers of radiation-shielding patches with making unsupported claims, and marketers later settled. Useful for seeing what an "unsupported claim" looks like in practice; it does not describe any product sold on this site or elsewhere today.
PUBLIC HEALTH GUIDANCE
An overview of the FDA’s assessment and links to scientific evidence. Scope: cellphone RF; not a blanket statement about every electromagnetic source.
LITERATURE ASSESSMENT
A review of literature published between 2008 and 2018. Read the scope, dates and limitations before applying its conclusions.
INTERNATIONAL GUIDELINES · 2020
The International Commission on Non-Ionizing Radiation Protection's 2020 reference exposure limits, used as a basis for regulation in many countries. Guidelines set exposure limits from established (thermal) effects with safety margins; they are not a study of any specific product, and adoption varies by country.
MEASUREMENT GUIDANCE
Methods and records for spectrum licensees. These compliance procedures should not be confused with a consumer room risk score.
MANUFACTURER DOCUMENTATION
Field modes, measurement ranges and stated accuracy conditions. Manufacturer claims are useful specifications, not our independent test results.
MANUFACTURER DOCUMENTATION
Distinguishes detection coverage from the stated frequency-response range. Confirm the exact version being purchased.
MEASUREMENT GUIDANCE
Occupational guidance on evaluating extremely low frequency electric and magnetic field exposure — the ELF/magnetic-field counterpart to Ofcom's RF-focused compliance guidance above. Written for workplace assessment, not consumer room measurement, but the measurement principles carry over.
We have not assembled product-specific independent studies for individual clothing, home shielding, laptop accessory or neutralizer models. This is a curated starting library, not a systematic review. Category guides identify questions to investigate; they do not fill those evidence gaps.
For each product report, record the exact model or material, method, test conditions, date, funding and limitations. Keep physical performance separate from any claimed health outcome.