Mobile phones have been designed as a way to communicate with someone when it is difficult or impossible to use a landline. However, excessive use of it can be pretty irritating. During these times, blocking signals might prove to be useful. There are many devices that can create an interruption in mobile phone signals and some of them have this specific purpose.

Take a quick look at how you can block cell phone signals without using a jammer.

  1. Use Magnetic Wood Panel

One way to do is through magnetic wood. This is a great way to battle against all those noisy mobile users.

  • This highly technical material will microwave signals and the user will not use the phone in the room where it is lined. With this, you will not even have to use a signal jammer.
  • The magnetic wood has some magnetic particles. As the electromagnetic wave hits the ferrite, the magnetic part of the wave is going to be absorbed. Thus, it blocks the phone.
  1. Blocking Bluetooth Frequencies

There are 4 different ways that you can use for making the wood absorb radio waves.

  • The first is just coated with ferrite powder.
  • In the second one, the ferrite powder mixed with a powder of cider wood. This is then pressed on to the wooden board.
  • The third way is to impregnate the wood with magnetic particles.
  • The last one is mixing wood pulp that contains ferrite powder in between 2 wooden panels that are thin enough.
  1. Do the Testing

When you test each wood by putting on the collars of the above-mentioned materials over a small antenna broadcasting radio waves at normal GSM mobile phone frequency of 1.8 gigahertz and 900 megahertz.

  • The antenna also may broadcast at a frequency of up to 2.5 gigahertz that covers up the range, which you can use mainly for all the wireless networks in phones such the Bluetooth or Wi-Fi.
  1. Using Ferrite Sandwich

Ferrite sandwich that is the thin sheets of wood sandwiched in between performs the best. 4 millimeter of the thick sandwich is capable of absorbing microwave radiation. This decreases the power of the wave by 97%. You can increase the thickness of the wooden sheets placed outside of the sandwich which augments the shield’s absorbing capability. Here are some places where you can use it.

  • You can use wooden shields for making walls and doors for a particular room or even the entire building where you do not want mobile phones to work. This can prove to be useful for restaurants and theatres. Here, silence is going to be valuable.
  • There are many Japanese cities that use the panels for absorbing the radio waves. This is mainly to get rid of the problem of any homes have wireless computing network and when many of them are together then it might interfere with each other. Hence, if you use the panels, it will help in dividing the house into different areas. This means several networks will be able to operate close to each other.

Even though the wooden panel comes at a high price, it can prove to be really useful.


With time cell phones are turning out to be more of an irritating device than a medium of connection. As a matter of fact, excessive use of it can also prove to be dangerous. For example, some people use it for wrong and unethical activities. Thus, it is time to cut down on its usage to some extent with a tool like a magnet.

Is there a way to block cell phone signal?

While the law clearly prohibits using a device to actively disrupt a cellphone signal, there are no rules against passive cellphone blocking. That means using things like wallpaper or building materials embedded with metal fragments to prevent cellphone signals from reaching inside or outside the room.

What materials can block cell phone signals?

Materials that do not conduct electricity like wood, drywall, plastics, and glass will impede a cellular signal, but not block it. Materials such as tin, copper, silver, aluminum and others can completely block the signal.

Does aluminum foil block cell?

Effect. Wrapping a cell phone in aluminum foil creates a Faraday cage. Because cell phone signals are electronic, the aluminum foil prevents the signal from reaching the cell phone.

What happens when you wrap your cell phone in aluminum foil?

According to It Still Works, the aluminum ultimately disrupts access to your phone’s antenna so no calls in or out can be made on the phone as long as it’s wrapped. Wrapping some of these phones in tin foil would only increase the cell’s signal, rather than suppress it.

Why you should wrap your key fob in aluminum foil?

But if your car isn’t equipped with these types of additional security measures, there are ways to block your key’s signal that don’t involve wrapping up your key like an old sandwich. After all, tin foil has been proven to dampen your key fob’s signal, but doesn’t completely block it since the material lacks density.