Your bedroom, a classroom and a work desk are more useful starting points than a count of nearby towers.
Think about where you spend time, which sources are there, and how their use changes. Then try the map below to see why several sources can contribute at the same place.
The map below uses invented antennas and values. It teaches one idea: contributions can add together.
An interactive illustration
Switch a source. Move the marker. See the sum change.
Five fictional antennas. One movable point. Explore how several contributions combine in a simplified model.
ILLUSTRATION ONLY No real location, measured exposure, safety limit or disease risk is represented.
1. Choose the sources.
2. Choose a location.
Or tap an open spot on the map. Sliders support arrow keys.
5Active sources
—Relative model value 0–100 reference scale
—Combined contribution ÷ strongest active source here
Lower model valueHigher
How this illustration works—and where it stops
Each active source contributes an arbitrary weight divided by squared distance, with a cap close to the source to avoid an infinite value. Contributions are added, then normalized against the all-on model peak. The colour scale is stretched to make differences visible.
Source weights and positions are invented. This model omits antenna direction, frequency, walls, reflections, time variation and wave interference. It cannot estimate exposure at your home, check compliance or predict health effects.
Findings beside their limits
What have studies actually found?
Studies use different populations, outcomes and exposure estimates. An association, a null result and an unanswered question each need their own explanation.
Researchers compared antenna locations with the locations of cancer deaths across an area. They reported a geographic association and also took field measurements.
Limits
A pattern across a neighborhood does not tell us each person’s exposure or what caused their illness. Population differences, other risks and exposure history complicate interpretation.
The study found no association with estimated exposure from base stations during the mother’s pregnancy.
Limits
Children aged 0–4, an earlier network era and estimated exposure at the birth address. This does not answer every question about adult disease, modern networks or lifetime exposure.
More than nearest-tower distance.
Elliott’s study also summed base-station power within 700 m and modelled power density from stations within 1,400 m. Multiple-source exposure has been studied.
The review judged that exposure likely does not increase childhood leukaemia risk (moderate certainty), and may not increase paediatric brain-tumour risk (low certainty).
Limits
This part of the review included both broadcasting antennas and mobile base stations. For the adult tumors this review focused on, no studies of these sources met its inclusion rules. There were few studies of children’s brain tumors.
A useful exposure inventory includes outdoor infrastructure and household sources. Record what is present and how it operates; proximity alone does not tell you the dose or the risk.
Placement, shared walls and whether the device is idle or transmitting.
02
Shared rooms.
Your router. Neighbours’ networks. Connected speakers.
Record
Where people spend time, device activity and measurements across the day.
03
Beside the body.
Phones. Wearables. Baby monitors near sleeping areas.
Record
Actual distance, operating mode and time spent nearby.
Devices vary. “Powered on” does not necessarily mean continuous transmission. A network list is not a calibrated field measurement, and this inventory does not rank products by health risk.
FCC rules include provisions for multiple RF sources and shared responsibility when emissions from multiple fixed sources exceed limits in an accessible area.
An assessment against an exposure limit does not, by itself, answer every question about long-term health, changing technologies or individual symptoms.
Ask what was measured or modelled, which sources were included, where, and over what period.
Make the question specific
What would better evidence capture?
Place
Where do people sleep, learn and work? How are indoor conditions represented?
Sources
Which signals are measured together, and which are missing from the assessment?
Time
How do traffic, operating modes and exposure change over a day or over years?
Outcome
Which health outcome, comparison group and follow-up period would answer the question?
Describe what you observed and what you want studied. You do not need to claim that an untested explanation is already proven.
Explore the technology
From sensing a room to directed energy.
Wi-Fi motion sensing, laboratory imaging, microwave systems and military lasers have different capabilities—and different evidence behind them.