Strange clicking noise only heard while playing back recorded information on cassettes, etc

Am disabled/health issues and need to record things, fast talkers, long conversations, etc. Since a Smart Meter was installed I’ve had issues with electronic failures and this noise. Like self-setting alarm clocks failures (all of them). Can’t hear the clicking noise by ear, only when I think I’ve recorded information, instructions, (over the phone/land line) and from the answering machine to clear it, that a constant clicking noise happens. Fast clicking like click… one count…click and on it goes. Voice quality from the calls severely drops or during is horrible. Folks at the VA don’t listen well when asked to speak up louder and clearly either.

Old retired jack of all trades and worked construction/contractor/business, etc. I am at a total loss on this one. I am not a techy. Have called in a couple of electricians, power company, cable tv/net service company, to the Geek Squad, no-one has a clue what it is. Just sounds like some kind of "electrical clicking noise" or "jamming like" from somewhere, somehow. Or "spooks." No ghosts or hauntings here, gremlins maybe.

Have tried numerous kinds/makes of recorders/cassettes (mainly what I use). AC and battery powered tests, all through the house same thing. I think I’ve recorded info from like a doctor’s office for later use and nothing but very low voice levels and the clicking. While the answering machine seems fine but not for longer talks, volume boosts, for info before shutting off.

Nothing else in my home has changed except for the wifi stuff, a amplified speaker phone to use, a new cable tv box, and the Smart Meter. No other noise makers in the house or has been, or causes found. Anyone ever hear of this going on in their home? TY for any suggestions and input. Have several heads/professionals around here scratching their heads on this one.