The Relationship Between Sleep and Electromagnetic Radiation
If you want to reduce EMF in your bedroom, the most effective steps cost nothing: move the phone, the router and anything plugged in beside the bed further away, and switch off what you don't need overnight. Shielding comes after that, if your readings still justify it. This checklist takes you through it room-side by room-side, with a meter reading before and after each step so you can see what actually changed.
Why the bedroom? Simply because it's where most people spend the longest unbroken stretch of time in one position. If you've decided to reduce exposure anywhere, it's the sensible place to start.
Step 1: Take a baseline reading
Before changing anything, measure. Without a baseline you can't tell whether any change made a difference.
- Measure at pillow height on both sides of the bed
- Measure against the wall behind the headboard
- Note what's switched on: router, phones, chargers, lamps
- Write it all down, with the date and time
You need an RF meter for wireless sources, and a low-frequency meter if you also want to check wiring and plug-in items. Our guide to finding EMF hotspots explains how to take readings that you can repeat.
Step 2: Deal with the phone
The phone is usually the closest wireless source to your head at night.
- Put it in airplane mode overnight. Most phones let you keep an alarm working in airplane mode.
- Or move it across the room. Radio signal falls away sharply with distance. A metre or two makes a large difference.
- Or use a Faraday pouch if you want it offline but within reach.
Measure again at the pillow. For many people this single step is the biggest change available.
Step 3: Find the router
Work out where your router and any Wi-Fi extenders are relative to the bed, including on the other side of walls and on the floor below. Under-stairs cupboards often sit directly beneath a bedroom.
- Move it away from the bedroom if you can
- Put it on a timer so it switches off overnight. A plug-in timer costs a few pounds
- Remove extenders from bedrooms, or switch them off at night
Measure again.
Step 4: Check the wall behind the headboard
This is the most commonly missed source. Check what's on the other side of the wall your bed is against: a neighbour's router, a TV, a consumer unit, a fridge. Things you'd never think of from inside the bedroom.
If you find something, the options are moving the bed to a different wall, or, if that isn't practical, treating that one wall. Measuring tells you whether it's worth doing.
Step 5: Look at what's plugged in by the bed
Bedside lamps, extension leads, charging cables and electric blankets produce low-frequency electric and magnetic fields. These only show up on a low-frequency meter, not an RF meter.
- Move extension leads and adapters away from the head of the bed
- Unplug chargers when not in use
- Consider a battery-powered bedside light
- Keep plug-in clocks and speakers at the far side of the bedside table
Step 6: Check the cordless phone and baby monitor
Cordless home phone bases often transmit continuously, whether or not a call is happening. Some baby monitors do the same. If there's a base station in or near the bedroom, move it. If you use a baby monitor, check whether it has a low-emission or voice-activated mode, and keep the parent unit at a distance from your own bed too.
Step 7: Measure again, then decide on shielding
Take the same readings as Step 1, in the same places, and compare.
For most people, Steps 2 to 6 produce a clear drop on the meter. What's left is mostly coming from outside the home: masts, neighbours, street equipment. That's the point to decide whether shielding is worth it for you.
- A bed canopy encloses the bed itself, which treats the space you care about without treating the whole room.
- Shielding fabric can line curtains on the window facing the strongest outside signal.
- Shielding paint suits a single wall with a known source behind it. It must be earthed by an electrician.
After fitting anything, measure again. If you can't see a difference on the meter, it isn't doing what it claimed.
A quick bedroom checklist
- Baseline reading at the pillow
- Phone in airplane mode, across the room, or in a pouch
- Router moved or on a timer; extenders out of the bedroom
- Wall behind the headboard checked
- Plug-in items moved away from the head of the bed
- Cordless phone base and baby monitor checked
- Second reading, then decide on shielding
- Final reading after any shielding
Frequently asked questions
What's the most effective way to reduce EMF in a bedroom?
Distance and switching off. Putting the phone in airplane mode or across the room, and moving or timing the router, usually changes readings more than any purchase. Shielding comes after, for what's left.
Should I turn my Wi-Fi off at night?
If you want to reduce overnight exposure, it's the simplest change available. A plug-in timer does it automatically and costs a few pounds.
Do bed canopies work?
A shielding canopy reduces radio signal inside the enclosure, which you can confirm with a meter. It needs to be fully closed, with no gaps, to perform to its rating. It doesn't affect sources inside the canopy, such as a phone under your pillow.
Do I need a meter to do this?
You can do Steps 2 to 6 without one, since they're sensible regardless. But you won't know how much each step changed, or whether shielding is worth buying, without measuring.
Can a neighbour's Wi-Fi reach my bedroom?
Yes, especially through a shared wall. Measuring against the wall behind your headboard is the way to find out.
This article is a practical guide to measuring and reducing radiofrequency and low-frequency fields in a bedroom. It does not make claims about sleep or health. UK and international health bodies do not consider harm to be established at typical domestic exposure levels. Reducing exposure is a personal choice. If you have concerns about your sleep, speak to your GP.