Radio Wave Experts

LOL...just what I needed a nice laugh

Good one

>2. Out of phase reflections of the radio signals off the walls and roof
>and floor could be effectively cancelling out the signal at th antenna.
>This is the same problem experienced when someone is too close to
>you and talking on the UHF but you can;t hear them.

I don't think you should smoke any more of that stuff :)

Mike Harding

I would agree. Each of the lights in the tunnels are usually about 2 kw each, Most of them being mercury arc types that are reknown for "splattering" rf interference across a wide frequency spectrum. It is simply "drowning out" the Ipod transmitter.

The problem will most likely be the retransmission of all the most common local radio signals both AM and FM Broadcast stations. The power and the bandwidth of the retransmissions will be overloading your FM radio. I know this happens in the Melbourne Long Tunnels so probably happens in the others as well.
They retransmit all these signals so they can talk to you with messages while your in the tunnel. I don't know if you have heard this happen, but if there is a holdup or an accident they break into the transmissions and advise you of what is happening.