5G "New Radio" cellular network - Downlink
Although 5G isn't set to fully release until after 2020, tests are being done to see if appropriate modulation methods, frequency range, etc, all are taken into effect. T-mobile is set to launch its 5G spectrum in 600 MHzMegaHertz (MHz) 10^6 Hz in the coming year.
There is also only a small availability of 5G access at the moment, as Microwave use is only limited to cities due to "small cell" usage, thus the photo and sound files being rather faint.
Since the spectrum has quite a few modulation methods, not much is heard other than a faint 4G modulation type of sound, and mostly just noise. You will hear few blips that may last up to 250 milliseconds depending on circumstances.