Noises and Signals

One man's noise could be another man's signal. In old days, a telephone modem converted the data traffic into sound patterns: low, or high pictch tones and variation of the frequencies. Today, when an FM radio is on, we often can hear the mobile phone signal coming before the phone rings. Sometimes, even the phone is quiet, we hear the short click sound signals that indicates the data traffic while an phone is off line.

I often predicted the coming phone rings afew seconds before it happened.