I have EHS, and I found that the farther I was from a speaker, and the lower the volume, the less I could feel the electromagnetic radiation. Therefore, I built a sound tube so that I could position myself a significant distance (30-35 feet) away from a speaker and still hear the audio. I made a sound tube out of forty feet of PEX tubing. I hooked up an an audio jack from a computer to a very small speaker (with a low volume). I then connected the speaker to one end of the tube with duct tape. I attached a stethoscope to the other end of the tube to use like headphones (see picture below). It worked for about six months really well before I finally became sensitive to it and had to limit my time using it. I began to be sensitive to electromagnetic radiation coming from the tube, and I am not sure whether it was coming through the air or through the tube.
I am chemically sensitive, and the PEX tubing was non-toxic for me. The PVC pipe (which I did not purchase) seemed somewhat toxic to the touch to me. I ran water over the pipes and also through them with a hose before I brought them inside to wash away chemicals. PEX comes in various diameters and I used the one-inch diameter. I purchased the PEX tubing at a local hardware store (Home Depot). PEX pipe bends more than PVC but it does not bend too much, which I thought was important because I read that if a sound tube bends too sharply, sound will not travel through it as well. I also needed the pipe to bend a little to navigate into another room.
A person at the hardware store cut each twenty-foot pipe into two pipes of ten feet each. I used copper connectors to connect the four pipes together to make the sound tube. I then connected the pipe to the walls and ceiling to secure it so that it would be off the floor and out of the way. I have also heard of people using clear Tygon tubing for a sound tube for a phone but I have not tried Tygon myself.
Speaker connected to sound tube:
Copper connector.
Stethoscope connected to end of tube:
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