Humans are so good at finding patterns, we often find patterns where none exist. This phenomenon is referred to as pareidolia.
Add to this the power of suggestion, and things get even more interesting. The back masking panic was fueled by audio pareidolia. As was EVP: electronic voice phenomena, a means by which ghost hunters fool themselves and others.
I made a presentation on the audio version of this phenomenon and deployed it during our unit on waves and sound.
It was all good, wholesome, laughable fun. And then it showed up in the trial of Derek Chauvin. I have updated the presentation to reflect this latest incident. I placed it at the vary end so that by the time you get there, you'll recognize exactly what's going on.