Old Home Security Megaphone/Speaker in Air Vent

Hi everyone,

I have had this problem the past few days where a random beeping/clicking noise would come from the air vents (Which I initially thought was coming from the furnace).

Now, it’s a non-stop, loud, beeping noise and I found the culprit in my air vent. It looks like a miniature megaphone that is most likely something to do with an old alarm system (we don’t have one). It has 2 cables running from it. What can this noise be indicating and how can I stop it?

Thanks in advance!

submitted by /u/VirtueVertex
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April 3, 2023
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