Michael S. Altus sez:


That looks like Morse code. Is it an electronic tone? Are there pauses
in it (to determine the exact letters)? Do you live close to a aircraft
navigation beacon (usually or some other radio signal tower?

My speakers pick up feedback from my cell phone. It goes off
occasionally, probably as the phone is checking nearby connections, and
goes off wildly when ringing.

Michael Lewis
Off Balance Productions

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