Oh, fun! These came up on HN a few years ago[0]. Recycling some of comment from then:

The "Tower Sound and Communications" (TSC) company that recorded many of these was located a few miles up the road from my home town. The booming male voice on the recordings also sounded familiar to me, too. I'm fairly certain I heard him on the local radio station that my father played over the PA system in our family grocery store when I was growing up.

Turns out that Cecil "Lee" Rutherford, the voice on the recordings, did VO work for local radio stations near my home town, too. He died in November, 2020.

He was involved in some ventures that persist today. His company EchoSat[1] (which I'd heard of because I had some involvement in the convenience store / retail petroleum industry) merged with an IT security firm to become "ControlScan", doing PCI testing stuff because gas stations and credit cards.

Quoting the obituary[2]:

He started Tower Sound and Communications while in Greenville to pursue a venture that would eventually spearhead "in store" broadcasting for companies such as Kmart (he became the voice of Kmart) and Jamesway which evolved into another corporation in KY called EchoSat that would use satellite technology in helping with multiple stores for POS processing and security.

There's an interview with Lee Rutherford in 2011.[3] He absolutely still has that "radio voice".

[0] https://news.ycombinator.com/item?id=25271464

[1] https://www.dandb.com/businessdirectory/towercommunicationsg...

[2] https://www.legacy.com/obituaries/dailyadvocate/obituary.asp...

[3] https://www.youtube.com/watch?v=BQqoQL3pkyI