出典:Wiktionary
出典:『Wiktionary』 (2026/03/20 20:54 UTC 版)
From radio communications phrase dating from the 1950s. The first five referred to a rating of signal clarity, the other to reception strength. See
Signal strength and readability report on Wikipedia.Wikipedia
five-by-five (not comparable)
five-by-five (plural five-by-fives)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/16 23:44 UTC 版)
Five by five is the best of 25 possible subjective responses used to describe the quality of communications, specifically the signal-to-noise ratio. As receiving stations move away from an analog radio transmitting site, the signal strength decreases gradually while noise levels increase. The signal becomes increasingly difficult to understand until it can no longer be heard as anything other than static.
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