Why does the land line or the radio make a static nose when my cell phone rings?

Answer 1

thats because the cell phone has several circuits that makes radio frequency signal, this radio signal is received in any wire acting like an aerial and then the signal is amplified in the audio output of the device that is suffering the interference.

the power of the signal is weak, and thats why it only make that noise when you put it close to the line or the radio.

Answer 2

You land line is picking up the radio wave from your cell phone. Next time, try making a call near a speaker, you can hear the electrical noise eminating from your cell phone.

Just to give you an idea how powerful the cellular signal is, those of you have a regular wireless house phone that is connected to the land line, it uses typical 900mhz frequency. If you take it outside your house and start walking a block, you'll lose your signal. Cell phone towers are about 2 miles apart. Your cell phone needs to be able to communicate with these towers which can range from 0 to 2 mile distance. Typical cell signal ranges from 800mhz 850mhz GSM.

Bottom line, 2 mile vs. 200ft. Your cell phones are at least 10x more powerful than your old wireless house phone. Ever wonder why people are claiming brain tumor from cell usage?

Answer 3

Your cell phone manufacture did not do the required electromagnetic compatibility testing. All consumer electronic goods sold in the US must pass this testing.

Answer 4

radiation