Worldwide HF Radio Beacons

The smooth subtle hiss carries through the air as the intermittent beeps call out into the night from one to the other. These beacons are used to keep a continuous assessment of radio frequency conditions. You can hear ZS6DN (South Africa, at 0:05) CS3B (Madeira, at 0:45) LU4AA (Argentina, at 0:55) OA4B (Peru, at 1:05) 4U1UN (New York City, at 1:25) W6WX (California, at 1:45). Keep track of the frequencies in your head with this intriguing sound. This sound uses the following sound file from Freesound http://www.freesound.org/samplesViewSingle.php?id=13734