Has anyone heard the weird vocal banter on shortwave radio frequency 7000 Khz? Or possibly 7005 Khz?

[mrkdvsn]

There's been reports of a weird kind of "chanting" around this frequency range for many years.

[F1nski]

Human hearing range ends in 20000hz it's impossible

[mrkdvsn]

HAHA... no, I mean RADIO frequency 7000 Khz... a little below the Amature Radio (HAM) band just above that.