This page is where you can find sound media relating to the Arecibo Message classroom activities.
In all cases the lower-pitched tone should be transcribed as a 0 and the higher-pitched tone as a 1.
1. Test tones for practice
This is so that you can recognise the difference between the two tones. The high tone represents a “1” (or ‘ON’) and the lower tone represents a “0” (or ‘OFF’). You’ll hear the high, then low tone and then the high and low repeated again.
2. Arecibo Message – Line 58 at different speeds
There are 1,679 bits in the Arecibo message and the string of digits can be put into a grid with 23 columns and 73 rows or lines. These sound files represent an audio version of Line 58.
a) Line 58 – fastest
b) Line 58 – medium pace
c) Line 58 – bit slower
d) Line 58 – slowest
3. An audible version of the Arecibo Message
Below is an audible-to-humans version of the Arecibo Message that was transmitted in 1974. The content of the message starts at 16 seconds. This sound file was uploaded to Soundcloud by Nadia Drake, the daughter of Frank Drake’s (who designed the Arecibo Message picture).
This is an audible-to-humans version of the Arecibo Message that was transmitted in 1974. The content of the message starts at 16 seconds. This sound file was uploaded to Soundcloud by Nadia Drake, the daughter of Frank Drake’s (who designed the Arecibo Message picture).
4. A binary letter
Binary tones representing a capital letter.
The Arecibo Message pages
Supported by Queen Mary University of London’s Centre for Public Engagement.
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