This sound is OTHR, not Jamming. At this frequency, the sound of Jamming for 5830 kHz( https://youtu.be/65ByUohFuLU ) and the sound of nearby OTHR( https://youtu.be/RiN7Nx0CQxE ) are interfered and heard. Both are always appearing at this side frequency. **Many appearances around the weekend. I think, North Korea does not use such halfway Jamming ..