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Basically, broadcasting static during a call is a sign that the signal strength is degrading (or that there is no sound coming through in any way). When signal strength degrades amply, the static noise emerges.
When there’s no communication coming through, it is a complete separate narrative. A walkie talkie has what is renowned as a ‘squelch’ control circuit that maintains tabs on the signal strength. The squelch circuit will mute the amplifier the minute it realizes that there’s no signal coming through into the radio. It’s, fundamentally, the same purpose as your TV has as soon as it cuts off an unavailable channel after a fixed time. But, within the moments before your two way radio ‘squelches’ the signal, you’ll hear static, or ‘white noise’ as it is also referred to as.
‘Squelching’ is a pretty vital part of all broadcasting gear. The tactic used in your walkie talkie known as a ‘carrier squelch’ is more likely to be manually regulating.
From Wikipedia (as of may 2013):
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So what’s ‘white noise?’ According to Joe Shambro, writing for About.com’s handbook to household video recording,
“White noise is a static sound that has equal energy on every frequency. Think about this for a second: every frequency from 20Hz to 20kHz is equally represented at the same velocity; this type of frequency scale is called a “linear” scale. This gives the noise a uniform, static sound that the human ear detects as somewhat harsh and heavy-handed toward the high frequencies. However, white noise represents a very unnatural way of presenting frequency data in terms of how our ears work.”
If you are experiencing signal reduction on your 2 way radio, there may be a number of reasons for this. ‘Wireless Woman’ a blogger with an tremendous website about two way radios, has this to declare:
So here you go.