UHF MASKING



  Masking is the phenomenon whereby certain sounds are not heard because of the simultaneous (or near- simultaneous) presence of other sounds of a similar frequency but at a higher level.

  Back in the 1960's experiments were carried out to try and create UHF Masking to disguise [or hide] UHF Voice/Data transmissions. The trials involved Fleet fitted UHF gear (692's and 696's - see Transmitter page), an ordinary noise source,

  The trials involved Fleet fitted UHF gear (692's and 696's - see Transmitter page), an ordinary noise source, and a special aerial which was not named or branded.

The following pictures come from that time.

         

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