listen to cb
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- livecbradio.com
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- TALK and listen live on a CB radio base station linked to the Internet.
[ Hits: 44504 | Votes: 147 | Rating: 5.93 ]
- Recognition of CW signs at different listening levels and frequencies
- The recognition of telegraphy masked by noise at 40 and 80 signs/min telegraphy speed was studied in 10 normal-hearing subjects at different sound pressure levels (25-85 dB SPL in steps of 5 dB) as well as at different test frequencies (2000, 1000, 800, 630, 500 and 250 Hz). The ability to recognize the signs varied with varying SPL. Recognition for most of the subjects was best at an SPL close to 70 dB.
All subjects improved their recognition as the frequency was lowered to 500 Hz, some even at 250 Hz. These facts should be taken into consideration when training telegraphy operators as well as in the construction of radio receivers to permit listening at low frequencies. Furthermore, the critical ratio was calculated at the different test frequencies.
[ Hits: 81 | Votes: 1 | Rating: 7 ]
- OH2FFY Ham radio and shortwave listening
- QRP Homebrew Ham Operator and constructor in Finland. Also works on the CB2HAM radio conversions and is into shortwave listening
[ Hits: 985 | Votes: 8 | Rating: 4.25 ]
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