Jamming

[Blueliner]

Sorry for a dumb question, but I have run across these kinds of signals on SDRuno recently. They sound like buzzing static.
Are these jamming signals or just some local interference?

 

[dlwtrunked]

I doubt if this is jamming. An audio recording would probably answer the question.

 

[boatbod]

Local interference most likely, possibly also intermod from nearby strong transmitters. The front ends of inexpensive sdr hardware are easily overloaded.