I was tuned in on 6955 USB from Fair Hill, Maryland's SDR ...
1802 UTC: Sine waves going up and down (kind of a ghostly sound for today), with a pause for a female voice saying numbers, which weren't audible enough to understand from my listening. This pattern continued over and over.
1816 UTC: Off.
***
1842 UTC: Back on again, but with more than one tone going at the same time now.
1846 UTC: Hearing music, then off a few minutes later.